Answer:
About 34%
Step-by-step explanation:
Given that :
Mean, m = 59 ; Standard deviation, s = 3
Bulb replacement numbering between 59 and 62
For, x = 59
Zscore = (x - m) / s
Z = (59 - 59) / 3 = 0
For x = 62
Z = (62 - 59) / 3 = 1
P(Z < 1) - P(Z < 0)
0.84134 - 0.5
= 0.34134
About 34%
A large school district is considering implementing a program that, if successful, would improve the reading scores of its students by 10 points. The current reading scores for the district are normally distributed with a mean of 25 and a standard deviation of 8. The administrators decide to test the new program in one school of 200 students. What is the standard deviation of the comparison distribution
Answer:
The standard deviation of the comparison distribution is 0.5657.
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
In this question:
Standard deviation of the population is 8, sample of 200. So
[tex]s = \frac{8}{\sqrt{200}} = 0.5657[/tex]
The standard deviation of the comparison distribution is 0.5657.
This is my last question please help me!
Answer:
D) 0.848
Step-by-step explanation:
Marginal Relative Frequency is when you divide the square(s) by the very total, in this case: 231.
Dividing 196/231, you get 0.848484 repeating.
Hope it helps!!!
Select all the statements that are true about the triangles
Answer: yeah sry i need point
Step-by-step explanation:
find the surface area of a cylinder with the height of 10 inches and a base diameter of 6 in
Answer:
339.24
Step-by-step explanation:
To find the surface area, you will need to the the area of the base of the cylinder. To do that, use the formula A=pi (r)^2
The radius is half the diameter do r=3
3.14(3)^2 should give you about 28.27.
This is the area of the top and bottom of the cylinder.
Now, do 28.27x10=282.7 to find the height surface area.
282.7+28.27+28.27=Surface area.
SA= about 339.24
Aanika performed a hypothesis test, and her p-value cutoff was 10%. What's the chance that her test will incorrectly reject the null hypothesis? In other words, what is the error probability?
A.) 90%
B.) 5%
C.) 10%
D.) Not enough information
Nathan bought 4 pounds of chicken for $8. How many pounds can he buy for $20? *
Answer:
The correct answer is 10 pounds of chicken
Step-by-step explanation:
First you do 8 divided by 4 to equal the unit price of 1 pound of chicken for 2 dollars then you do 20 divided by 2 to equal 10 pounds of chicken for 20 dollars
HAVE A GOOD DAY!
A rectangular prism has a length of 11 centimeters, a height of 13 centimeters, and a width of 2 centimeters. What is its volume, in cubic centimeters?
Answer:
286 cm
Step-by-step explanation:
Answer:
286 centimeters³
Step-by-step explanation:
identify variable: L=11 W=2 H=13
use volume of a rectangular prism formula: V=LWH
substitute variables into formula: V=(11)(2)(3)
V=286 cm³
At Brighton Middle School, Mr. Yule asked 50 randomly selected students from each grade level about their favorite subject, and 12 chose science. He used this data to draw the inference that about 25% of middle school students will indicate science is their favorite subject. If there are 200 students all together, did he make a reasonable inference?
No, Mr. Yule’s sample is biased and too small to be representative of the population.
Yes, Mr. Yule’s sample is small and biased, so it is representative of the population.
No, Mr. Yule’s percentage is too large. He should have used 6%.
Yes, Mr. Yule’s sample is random and representative of the population.
Answer:
D.) "Yes, Mr. Yule’s sample is random and representative of the population."
Step-by-step explanation:
A cheerleading team practices each week for 375 minutes. The team practiced for 26 weeks during the year. How many minutes did the team practice during the year?
Answer:
9750 min or 162.5 hours
Step-by-step explanation:
375 times 26 = 9750
Answer:
C) 24 cheerleaders
Step-by-step explanation:
20 last year
subtract 3 for those who decided not to join
20 -3 = 17
add 7 for those who joined
17 + 7 = 24
there are 24 cheer leaders
hope it help
Use the table that shows the results of a class poll.
Question
Yes
No
Do
you walk to school?
18% yes
82% no
Is there a pet in your home?
14
—— yes
25
11
—— no
25
Do you play on a sports team?
0.42 yes
0.58 no
Which category in the table shows the least portion of the class?
Answer:
The people who said Yes to having a pet in their home is greater
Step-by-step explanation:
We are asked to compare 18% and 14/25. Let's get them to their lowest common denominator:
18% = 18/100
14/25 * 4 = 56/100
18/100 is clearly much less than 56/100. If you don't want to write all this out, you can also eyeball that 14/25 is over half, whereas 18% is not close to half.
I hope this helps! Sorry if its doesn't though:( I hope you have a amazing day! And maybe you could mark this brainly?
Need answers right away due tonight please. Geometry composite shapes.
The recommended number of flowers to plant in a garden is probational to its area as shown in the table below. What is the recommended number of flowers for a garden of 24 square feet?
Answer:
The recommended number of flowers is 32
Step-by-step explanation:
Given
The attached graph
Required
The number of flowers when area = 15
First, calculate the slope (m)
Considering
[tex](x_1,y1) = (12,60)[/tex]
[tex](x_2,y_2) = (15,20)[/tex]
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]m = \frac{20-16}{15-12}[/tex]
[tex]m = \frac{4}{3}[/tex]
Considering:
[tex](x_1,y_1) = (15,20)[/tex]
[tex](x_2,y_2) = (24,y)[/tex]
The slope is:
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]m = \frac{y - 20}{24 - 15}[/tex]
[tex]m = \frac{y - 20}{9}[/tex]
Recall that: [tex]m = \frac{4}{3}[/tex]
So:
[tex]\frac{4}{3} = \frac{y - 20}{9}[/tex]
Multiply through by 9
[tex]3*4 = y - 20[/tex]
[tex]y = 20 + 3 * 4[/tex]
[tex]y = 32[/tex]
Find the zeros of the function below.
\small -7x=x^2+12
Answer:
read explanation
Step-by-step explanation:
this is a quadratic equation
first, move the 7x over to the other side so that we have 0 on one side
x^2+7x+12=0
now, we can factor
turn 7x into 3x and 4x, so x^2+3x+4x+12=0
you can turn x^2+3x into x(x+3) and 4x+12 into 4(x+3)
so, our new equation is x(x+3)+4(x+3)=0
that can be turned into (x+4)(x+3)=0 via the distributive property
so, either x+4 or x+3 has to be equal to 0
so, x is either -4 or -3
hope this helped
james jogged around the track 0.68 hours at an average speed 28.9 miles per hour how far did he jog?
Answer:
Step-by-step explanation:
0.68hr(28.9mi/hr)=19.652mi
PLEASEEEEEEEEEEEEEEE HELP ME WILL GIVE BRAINLIST
In the song, 7 pounds, 5 ounces was the median weight of the students at birth. Which of these is correct?
Answer: Half the students weighed less than 7 pounds, 5 ounces, and half the students weighed more.
Step-by-step explanation:
You have 33 nickels and quarters whose value is $3.85. Find the number of nickels and quarters that
you have.
What is the answer
Answer:
11 quarters- 2.75
22 nickels- 1.10
Please answer quick
Answer:
its the first option
Step-by-step explanation:
.
-2x-6y= 36-4x
2(3x - 3y) =36
4x-6y + 36 = -2x
Answer:
a67y.....................
Hey guys how do you find the perimeter of this shape in inches (explain)
Please helpppp
I need the answer for this one please
Answer:
Step-by-step explanation:
65
Determine which two values the following expression is between.
[tex]\sqrt[7]{37\\}[/tex]
Answer:
A. 42.57 and 42.58
42.579337.......
Miguel is a boxer. He had to decrease his weight by 4%
to 160 pounds in order to fight in this weight class.
What was his starting weight? Round his weight to the
nearest hundredth. Show your work.
Answer:
166.66 pounds
Step-by-step explanation:
160/0.96=166.66667
This is how I remember doing these questions
HELP PLS Find the length of BC to the nearest tenth:
B
350
A
12
с
20.9
14.6
17.1
118
Answer:
14.6
Step-by-step explanation:
using the trigonometry ratio
cosine
cos35= 12/BC
BC= 12/cos35
BC = 14.64
Simplify the following expression.
Answer:
x^(4/21)
Step-by-step explanation:
Find the value of −12 + 8 −(−9). Question 20 options: −13 −5 13 5
Answer:
D) 5
Step-by-step explanation:
-12 + 8 + 9 = 5
For which value of k does the system has no solutions?
Equation:
3x + y = 4
kx + y = −2
Answers:
A: -3
B: -2
C: 3
D: 4
Answer:
The answer to this question is 4
Step-by-step explanation:
What is the value of x in the figure below?
Answer:
x = 25°
Step-by-step explanation:
The sum of interior angles in a triangle is equal to 180°
The given triangle is a right triangle which means one of its angle has a measure of 90°
since thd other angle is given as 65 to calculate x we just add the given measures and subtract it from 180
90° + 65 + x = 180
155 + x = 180 subtract 155 from both sides
x = 25°
A triangle has sides of length 8 cm, 5 cm, and 5 cm. How many unique
triangles can be drawn that fit that description? Explain or show your
reasoning
1
Answer: I think it’s 2
Step-by-step explanation: because either of the sides are equal or the base and a side is not possible.
Aren’t you from CCA, Ryan Rivera, Maths 5th period.
Answer:
2
hope this helps
PLSSS hurry this is on my EXAM
A family installs and fills an aboveground pool. The swimming pool costs $850 to install, and it costs $75 per thousand gallons of water to fill.
Which function represents the total cost, C, of installing and filling a pool with 2 thousands of gallons of water?
Wouldnt that just be 75x2? bc if so then
The answer is:
75x2=150+ 850=1000