A study was conducted on the effects of long-term marriage (more than 10 years). Researchers gathered data from a random sample of 4,563 adults and measured quite a few variables, in addition to the explanatory variable of marriage and the response variable of longer life span. According to a newspaper article summarizing the study, those in long-term marriages were more likely to be more physically active, at a healthy weight, and nonsmokers. Those who were not married were about 20% more likely to be deceased. What conclusion can we draw from this study

Answers

Answer 1

Answer:

We cannot infer a cause and effect relationship because the treatments imposed were not blocked correctly.

Step-by-step explanation:

The treatments given to the groups given in the question where not assigned proper treatments to establish proper randomized block design.

Thus, we can say the conclusion is that we can't truly infer a cause and effect relationship as the blocks were not properly done.


Related Questions

how many different ways can officers be appointed

Answers

32,760 hopefully this helps

Select the correct answer. The graph of the rational function f is shown. Which graph is the graph of g(x)=-f(x)?

Answers

Answer:

see picture

Step-by-step explanation:

HELP ASAP PLS ANSWER THE QUESTION IN THE PIC I GIV BRAINLEST AND LOTS OF POINTS TO CORRECT ANSWER

Answers

Answer:

What the question ?

Find the value of x for the quadrilateral with exterior angles of 6x+12, 15x-5, 10x+13, and 12x-4.

answers
90
360
3.81
8​

Answers

The answer for the question would’ve been 90

10 POINTS PLS ANSWER

Answers

Answer:

Step-by-step explanation:

FGE is a straight line, and striaght lines measure 180 by definition. Therefore, x, angle BGA, and 55 all add together to equal 180. But notice that x and 55 are both marked with a single swish, meaning they are the same measure. So:

180 - 55 - 55 = x, so

x = 70

expression equivalent to (4x+3)+(-2x+4) is

Answers

Answer:

7x + 2x

Step-by-step explanation:

9x^2

Answer: 2x+7

Step-by-step explanation:

Since I am going to assume that you want me to simplify this expression, thats what I'm going to do.

1. Distribute the +1: 4x+3-2x+4

2. Combine like terms: 2x+7

Have a nice day! :D

Which of the following applications of undefined terms made use of the concept of point as a location in space?
A RADAR. C laser beam
b tip of needle. D mole o a face

Answers

the answer to this is A

2. Find to the nearest foot the height of a vertical post if its shadow is 18 feet long when
the angle of elevation of the sun is 38º.

Answers

It’s 16.8 foot or sum like that


!!!!!!! please help!!!!!!

Answers

Answer:

The population is decreasing.

Step-by-step explanation:

As x, time, increases, the y, population, decreases. It too has a negative slope.

Answer:

A

Step-by-step explanation:

awnser please dont have much time

Answers

pretty sure it's this one couldn't see the bottom though

OMG PLEASE HELP! THIS ASSIFNMENT DUE IN LIKE 5 MINUTES!! (Sorry if blurry pic)

Answers

Answer:

I think the 3rd answer

Step-by-step explanation:


g(t)= t^2 + 3
h(t) = 4t – 3
Find (g · h)(-1)

Answers

Answer:

fifty-two. Explanation: g(h(−1 ))=g(x). x=h(−1)=4(−1)−3=−4−3=−7. g(x)= g(−7)=72+3=49+3=52.

A sociologist recently conducted a survey of citizens over 60 years of age who have net worths too high to qualify for Medicaid but have no private health insurance. The ages of the 25 uninsured senior citizens were as follows: Suppose the mean and standard deviation are 74.04 and 9.75, respectively. If we assume that the distribution of ages is mound-shaped and symmetric, what percentage of the respondents will be between 64.29 and 93.54 years old

Answers

Answer:

81.85% of the respondents will be between 64.29 and 93.54 years old

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Mean and standard deviation are 74.04 and 9.75

This means that [tex]\mu = 74.04, \sigma = 9.75[/tex]

What percentage of the respondents will be between 64.29 and 93.54 years old?

The proportion is the pvalue of Z when X = 93.54 subtracted by the pvalue of Z when X = 64.29. So

X = 93.54

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{93.54 - 74.04}{9.75}[/tex]

[tex]Z = 2[/tex]

[tex]Z = 2[/tex] has a pvalue of 0.9772.

X = 64.29

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{64.29 - 74.04}{9.75}[/tex]

[tex]Z = -1[/tex]

[tex]Z = -1[/tex] has a pvalue of 0.1587.

0.9772 - 0.1587 = 0.8185

0.8185*100 = 81.85%

81.85% of the respondents will be between 64.29 and 93.54 years old

What is the equation of an exponential function?
1)y=mx+b
2)a=b+c
3)y=a (b)^x
4)y=ax^2+bx+c

Answers

The is answer is choice 3

The Martins drove the car from 7 a.m. to 4 p.m. and
traveled 468 miles. Their average speed was how many
miles
per
hour?

Answers

Their average speed was 52 miles per hour

choose yes or no to tell whether each of the following describes a convenience sampling method​

Answers

No, this is systematic sampling. Systematic sampling is where you use a specifically well defined rule to generate your sample. In this case, that rule is "pick every 4th customer". In other words, if the customer number is a multiple of 4, then they are selected.No, this is simple random sampling (SRS). Each school is assigned a number, and those numbers are fed into a computer to generate a list of schools to form the sample. A random number table can also be used. When comparing to systematic sampling, SRS in my opinion is the stronger sampling method in that we get a better representative sample. Consider a case where on some unlucky circumstance that every 4th customer happens to be male (refer to problem 1). That would mean males are over-represented while females are completely under-represented. This example, while a bit extreme, shows a flaw in systematic sampling. So in short, it's best to use SRS if you could only pick one.  Yes, this is convenience sampling. As the name strongly implies, convenience sampling is the easiest or most convenient way to select a sample. Sheila simply looked to her left and right to get the sample points she needed. While it's tempting to use this method due to its ease, it's probably very clear that this method can be heavily biased. She should employ SRS to get a better representative sample.Yes, this is convenience sampling. For the quality control manager, the easiest most convenient ladders he found were the first five closest to him. Those five ladders may or may not be representative of the population. The population being the set of all ladders in the shop. If those ladders don't break, then the manager may get the wrong conclusion that all if not most of the ladders won't break. However, his sample is not representative and there may be bad faulty ladders in the shop somewhere. He should do a SRS to address this problem. Perhaps even a cluster sample where he breaks the shop's floor area into various chunks and does random sampling based on that. A cluster sample is useful because some areas of the shop may be better or worse off compared to others. Eg: if there's a leak in the roof in one spot, or if there's more moisture, then that cluster is different from the rest that don't have such issues.

In short, we have these answers in this exact order: No, No, Yes, Yes.

I need help with question 8

Answers

Answer:

the answer is B!

Step-by-step explanation:

because :

Jerry has = 150$

he "*DEPOSITED*" = 50$

(When the word deposit comes, it basically means we need to ADD)

therefore, 150 +50x = 500

(7 weeks) so,

150 + 50 * 7 = 500

see! my answer is correct !

mark me brainliest now pweasee! ;)) ♡♡♡

If x = 4 units, y = 12 units, and h = 9 units, find the area of the parallelogram shown above using decomposition.
A.
36 square units
B.
108 square units
C.
144 square units
D.
72 square units

Answers

Answer:

C. 144 square units

Step-by-step explanation:

Please look at the photo I've drawn for reference, it should be self explanitory, but please ask if you need more help! Cheers!

Answer:

C.144 square units

Step-by-step explanation:

Find the area of this shape pleaseeeeee

Answers

Answer:

22 meters squared

Split the figure into a 2*9 rectangle and 2*4 triangle

HELP HELP HELP ME PLEASE-

Answers

i’m pretty sure it’s b i apologize if it’s not

the answer is C or E lol because it's asking I've you put > in between both of them which one would be wrong if you put > in between them I look over them it would be c or e

If you receive 25\% off an item costing $22.00, how much money do you save?

Answers

Answer:

5.50

Step-by-step explanation:

They save 5.50

Answer:

$5.50

Step-by-step explanation:

Hello! This is an easy one. If we are trying to find how much she is saving all we would need to do is multiply.

$22.00 * 25% = $5.50

If we are trying to find out the total with the discount all we would need to do is subtract.

22 - 5.5 = $16.50

Hope this helps!!

7. A computer company that recently developed a new software product wanted to estimate the mean time taken to learn how to use this software by people who are somewhat familiar with computers. A random sample of 12 such persons was selected. The following data give the times taken (in hours) by these persons to learn how to use this software. 1.75 2.25 2.4 1.9 1.5 2.75 2.15 2.25 1.8 2.2 3.25 2.6 a. What is the point estimate of the population mean

Answers

Answer:

What company

Step-by-step explanation:

pls and this question​

Answers

Answer:

-4

Step-by-step explanation:

that number cannot be simplified

find the area of the sector.

image and anwser choices is in the image please helpp i’ll give brainliest

Answers

ans. 11.16 in square
80/360*pi*4square

A furniture salesman makes 3.5% commission. Her monthly sales are $18,545. Her annual salary is $18,995.80. What’s her monthly pay? Write just the value that represents your answer.

Answers

Using proportions, it is found that her monthly salary is of $1,528.9.

What is a proportion?

A proportion is a fraction of total amount.

In this problem, her monthly sales are $18,545, with a commission of 3.5%, hence, in commission, the amount she makes is:

0.035 x 18545 = 649.075

Her annual salary is $18,995.80, of which 18995.80 - 649 = $18,346.8 she receives in 12 payments, hence:

18,346.8/12 = $1,528.9.

Her monthly salary is of $1,528.9.

You can learn more about proportions at https://brainly.com/question/24372153

PLEASE HELP ME AND MY FRIEND WITH THIS PROBLEM!!​

Answers

Answer:

36 possible outcomes

Step-by-step explanation:

Jerome makes and sells his own energy drinks. He mixes powdered drink mix with water to create his own special blend.

Jerome usually uses 8 cups of water and 3 cups of drink mix. Tomorrow, there is a road race in town, however, and Jerome thinks he’ll be able to sell a lot more of his energy drinks than usual.

Jerome’s brother told him to add one cup of water for every one cup of drink mix he added to keep the ratio of water to drink mix the same and still increase the total amount of energy drink.

Jerome’s sister told him to multiply both the amount of water and the amount of drink mix by the same number to keep the ratio the same and still increase the total amount of energy drink.

Who is correct: Jerome’s brother or Jerome’s sister?

Answers

Answer:

Jerome's brother

Step-by-step explanation:

Can someone help me please

Answers

9514 1404 393

Answer:

  {Segments, Geometric mean}

  {PS and QS, RS}

  {PS and PQ, PR}

  {PQ and QS, QR}

Step-by-step explanation:

The three geometric mean relationships are derived from the similarity of the triangles the similarity proportions can be written 3 ways, each giving rise to one of the geometric mean relations.

  short leg : long leg = SP/RS = RS/SQ   ⇒   RS² = SP·SQ

  short leg : hypotenuse = RP/PQ = PS/RP   ⇒   RP² = PS·PQ

  long leg : hypotenuse = RQ/QP = QS/RQ   ⇒   RQ² = QS·QP

I find it easier to remember when I think of it as the segment from R is equal to the geometric mean of the two segments the other end is connected to.

__

  segments PS and QS, gm RS

  segments PS and PQ, gm PR

  segments PQ and QS, gm QR

Yi Min owns a small store. The first month the store was
open, she made $1,375 in profit. During the next month, she
advertised in the local newspaper and saw a 60% increase
in profit. How much profit did she make the second month?

Answers

Yi Min owns a small store. The first month the store was

open, she made $1,375 in profit. During the next month, she

advertised in the local newspaper and saw a 60% increase

in profit. How much profit did she make the second month?

'Percent (%)' means 'out of one hundred':

p% = p 'out of one hundred',

p% is read p 'percent',

p% = p/100 = p ÷ 100.

60% = 60/100 = 60 ÷ 100 = 0.6.

100% = 100/100 = 100 ÷ 100 = 1.

What number goes into both 21 and 30

Answers

Answer:

3

Step-by-step explanation:

21/3 = 7

30/3 = 10

Other Questions
What is the first step you would take to solve this equation, and why? 49n + 986 = -43. Anchor Company purchased a manufacturing machine with a list price of $93,000 and received a 2% cash discount on the purchase. The machine was delivered under terms Free On Board shipping point, and freight costs amounted to $3,800. Anchor paid $5,400 to have the machine installed and tested. Insurance costs to protect the asset from fire and theft amounted to $7,000 for the first year of operations. Based on this information, the amount of cost recorded in the asset account would be: 1. Since minerals come from non-living things, they areA. crystalsB. solids C. coloured D. inorganic substances En una escuela hay 196 estudiantes en los cuales 84 son mujeres. La razn geometrca de mujeres a varanos que estudian en dicha escuela es: Dave sold 60 general and reserved tickets for a concert. He sold general tickets for $10 each and reserved tickets for $15 each collecting a total of $725. Write a system of equations to determine the number of tickets he sold at each price and solve your system of equations? HELP!!!While watching the stars one night, you noticed the stars appeared to move across the sky. You were making ________.a. a conclusionb. a hypothesisc. an inferenced. an observation A farm has chickens and cows. All the cows have 4 legs and all the chicken have 2 legs. All together, there are 82 cow and chicken legs on the farm. Complete the table to show some possible combinations of chickens and cows to get 82 total legs. (please help me quickly will give brainlyist) You have researched your dream around-the-world vacation and determined that the total cost of the vacation will be $44,000. You feel you can earn an APR of 10.3 percent compounded monthly and plan to save $560 per month until you reach your goal. How many years will it be until you reach your goal and enjoy your well-deserved vacation what is the author's argument in emoticons arent ruining language Under the alimony rules:________ a. To determine whether a cash payment is alimony, one must consult the state laws that define alimony b. A person who receives a property division has experienced an increase in wealth and thus should be subject to tax. c. Alimony paid per a 2015 divorce agreement is included in the gross income of the recipient of the payments. d. A person who earns $90,000 and pays $20,000 in alimony per a divorce agreement entered into in 2019, is allowed to deduct the $20,000. e. None of these Mary buys a laptop that originally costs $1,340. It is on sale for 15% off. What is the final price? From where does the trumpet player's weariness come in the first stanza? PLEASE HELP I GIVE BRAINLIEST Lucy invested $19,000 in an account paying an interest rate of 3% compounded annually. Assuming no deposits or withdrawals are made, how much money, to the nearest hundred dollars, would be in the account after 8 years? According to the video, what part did technology play in the Cuban Missile Crisis?It allowed the US to take down Soviet air bases in Cuba.It made it possible for the US to identify missile sites in Cuba.It helped the US prepare troops for a possible invasion of Cuba.It helped the US communicate with spies who were stationed in Cuba. Tim has used an abstract form of expression in his artwork. Which formal element of artwork is being discussed here? How does Tom Sawyer Change as a person through the book. PLZ HELPWhich word best transitions from one sentence to a similar idea in another sentence?althoughas within contrastunlike You are the administrator for a small network. You have approximately 50 users who are served by a single Windows server. You are providing Active Directory, DNS, and DHCP with this server. Your clients all use Windows workstations. Last week, an employee quit. A replacement has been hired and will be starting next Monday. The new user will need to have access to everything the previous user had, including document files held in the Home folder. You need to set up an account for the new user that all the access required. What should you do? 1. Solve for x: x/12 + 15 = 648 x=__2.Solve for x: 4(1.75 + x) = 18 x=__3.Solve for x: 6x - 9 = 42 x=__