Answer:
The test value is z = -1.31.
Step-by-step explanation:
The Eagle Ridge Contractors Association claims the average price of a home in their subdivision is $125,150.
This means that the null hypothesis is that the mean is this value, that is:
[tex]H_0: \mu = 125150[/tex]
The Eagle Ridge Home Owners Association is interested in knowing if the costs of homes for sale in this subdivision are actually lower than claimed.
This means that at the alternate hypotehsis we test that the mean is lower than that value, that is:
[tex]H_a: \mu < 125150[/tex]
The test statistic is:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
125150 is tested at the null hypothesis:
This means that [tex]\mu = 125150[/tex]
Standard deviation of $7,350.
This means that [tex]\sigma = 7350[/tex]
A sample of 36 homes for sale in this subdivision had an average selling price of $123,550.
This means that [tex]n = 36, X = 123550[/tex]
Compute the test value.
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{123550 - 125150}{\frac{7350}{\sqrt{36}}}[/tex]
[tex]z = -1.31[/tex]
The test value is z = -1.31.
Need help on this please
Answer:
[tex]x^{2}[/tex] + (y-5)² = 8
solve by using appropriate Laws of exponents
Answer:
answer is 0.1 ....................
please help me I will give a brainlist
Answer:
(-7, 31)
Step-by-step explanation:
If sin(38°) and cos(52°) does that add up to 90°?
Answer:
38 plus 52 is in fact 90, but Sin and Cos will be different.
Step-by-step explanation:
Honestly I haven't learned Sin or Cos
On a survey, 3 out of every 8 band members prefer listening to jazz music. Based on the survey, how many out of 240 band members would prefer listening to jazz music
Answer:
90
Step-by-step explanation:
Describe the correlation between the amount spent and the number of people spending the money.
A) negative correlation; as the amount spent increases, the number of people spending that amount decreases
B) negative correlation; as the amount spent increases, the number of people spending that amount increases
C) positive correlation; as the amount spent increases, the number of people spending that amount decreases
D) positive correlation; as the amount spent decreases, the number of people spending that amount increases
Answer:
A. Negative correlation; as the amount spent increases, the number of people spendings that amount decreases.
It is so clear, just look at the graph and you will see exactly what im talking about
find the volume of the sphere radius is 20 meters
The town of Rayburn received 7 more inches of snow than the town of Greenville. Let g represent the amount of snow in Greenville. Enter an algebraic expression to represent the amount of snow in Rayburn. The algebraic expression that can be used is
Answer:
r = g + 7 (let "r" be amount of snow rayburn got)
Step-by-step explanation:
Lets let r = the amount of snow rayburn got.
r = g + 7
PLEASE HELP! OFFERING 20 POINTS, EVEN THOUGH IM RUNNING OUT OF POINTS DUE TO THE AMOUNT OF QUESTIONS I HAVE BEEN ASKING
For the following situation, which inequality would you use to describe it?
The library is having a party for any student who read at least 25 books over the summer. Priya read x books and was invited to the party.
Answer:
x>or equal to25
Step-by-step explanation:
Answer:
sus
Step-by-step explanation:
amogus
An employee gets a signing bonus of $100 and is paid $25 per hour they work. Represent this scenario by writing an equation for x hours worked
Answer:
$(100 + 25x )
Step-by-step explanation:
X= number of hours
The numbers are just like money just without the dollar sign
100 + 25(x)
After you get your number remember to put your sign you were looking for
Hope I helped you out:)
Answer:
$(100 + 25x)
Explanation:
if the employee works for 1 hour, they earn 1 × $25 = $25. if they work for 2 hours, they earn 2 × $25 = $50. thus, representing the number of hours they work by x, we can say that they earn $(25x) per hour.
now, we add on the signing bonus: $(100 + 25x).
i hope this helps! :D
I’ll give brainliest
Find the area of the larger sector.
Round to the nearest tenth.
2550
13.4 miles
Area
[? ]miles?
Answer:
Step-by-step explanation:
Answer: 399.6
Step-by-step explanation:
h
I have a question for special product patterns.
It is in the attached image.
HELP PLEASEEE
Solve 5x- c= k for x.
A. X - 5(k+c)
B. X = 5(k-c)
C.
k-c
X=
D.
kic
5
Martin cycles at an average speed of 12mph. On Tuesday, he leaves his house at 9:15am
and goes on a bike ride for 40 miles. What time does he arrive home?
Step-by-step explanation:
40÷12= 3.33
so it approximately takes him 3hrs and 18minutes
so 9:15 + 3hrs 18 minutes is 12: 33 pm?
How much will be in the account after 18 years to the nearest cent
Answer:
A = $34,494.79
Step-by-step explanation:
The total amount accrued, principal plus interest, with compound interest on a principal of $9,000.00 at a rate of 7.75% per year compounded 1 times per year over 18 years is $34,494.79.
I’ll give you brain list if you solve it
Answer:
1000$ is the correct ans I think ?
You deposit $4,400 into a bank account with an annual simple interest rate of 2.1%. a. How much interest does the account earn in 15 months? b. What is the balance of the account after 15 months?
Hi I don't know how to explain this in steps but the interest is 15523,2
The balance is 1108,8
Which statement is true?
−2.4<−2.40
−2.4≠−2.40
−2.4≤−2.40
−2.4>−2.40
Which value of x is a solution of the inequality?
3x+5≤14
x = 3
x = 4
x = 5
x = 6
Which values are solutions to the inequality?
5r≤6r−8
Select each correct answer.
r = 7
r = 8
r = 9
r = 10
Which values from the given replacement set make up the solution set of the inequality?
2b–4≥2 ; {1,2,3,4}
{1,2,3}
{1,2}
{3,4}
{2,3,4}
Answer:
1. -2.4>-2.40
2.×=3
3.r=8
4.{3,4}
6x+2 = 5x+18 PLS QUICKKKK
Answer:
16
Step-by-step explanation:
Equation : 6x+2=5x+18
Like Terms : x + 2 = 18
Like Terms Again : x = 16
Answer:
6x+2=5x+18
6x-5x=18-2
X=16
Step-by-step explanation:
First you need to group numbers of like terms in one side. Then when you take the other number to the other side of equal sign changes it's form eg +6 change to - 6
I WILL GIVE BRAINILYEST!!!This is a graded discussion:
Modules
Mathematical Modeling Discussion
Syllabus
Grades
99 Co
5.272 a
People
0.31 MeV B 99.80%
Office 365
1.48 Mev B-
1.1732 MeV Y
0365 Email
1.3325 MeV Y
The rate of decay of a radioactive substance depends upon the
amount present initially. The mass y (mg) of the radioactive substance
cobalt-60 present in a sample at time < (years) is represented by the
-0.13151
exponential equation y = 50 e
Answer the following questions in complete sentences.
1. How does the exponential equation above compare to the equation
for simple interest that is compounded continuously? Explain the
similarities. What is the initial amount of cobalt-60 in the sample?
2. How much cobalt-60 is left after 8.4 years? Show your work
3. What would be the y-intercept of the graph? What does it
represent?
4. After how many years will the amount of cobalt-60 left be 6.25
mg? Explain what happens to the cobalt-60 after 50 years?
5. Discuss some real-world" examples and uses of cobalt-60
Answer:1.40
2.20
3.100
4.39
5.7
7
Step-by-step explanation:
What is the measure of ZB, in degrees?
Please help!!!!!!!!!!!!!!!!!!!
Answer:
there are infinitely many solutions
Step-by-step explanation:
1/2(b + 14) is the same as (b + 14) / 2
3
Hope made 3 different yo-yós. She used 1 meters of string for the first yo-yo, 1 meter of string for the
4
1
second yo-yo, and a total of 4 meters of string,
3
Hope uses the equation, 1 +1+y=4. to represent the situation.
What does the variable y represent in the equation?
Choose 1 answer:
Number of yo-yos Hope made
Number of meters of string in third yo-yo
Total number of meters of string Hope used
Answer:
The variable Y represents the number of meters of string in the third yoyo
Step-by-step explanation:
In this equation y stands for the unknown variable. The equation tell you that hope made 3 different yo-yos so the number of yo-yos hope made isn't unknown, meaning, it cant be the first answer. The problem also tells you that hope used a total of 4 meters of string which means that the total number of string used isn't the unknown variable. The number of meters of string in the third yo-yo is the only number that isn't. This makes the number of sting used in the third yo-yo the unknown variable, making it y.
A company has 500 employees, and 60% of them have children. Suppose that we randomly select 4 of these
employees.
Which of the following would find the probability that exactly 3 of the 4 employees selected have children?
The probability that exactly 3 of the 4 employees selected will have children is given by binomial distribution formula ⁴C₃(0.60)³(0.40)
What is a Binomial Distribution?
The binomial distribution is a type of probability distribution that predicts the likelihood of obtaining one of two outcomes given a set of inputs. It summarizes the number of tries where each trial has the equal chance of producing the same result.
The formula for Binomial Distribution is given by
P ( x ) = ⁿCₓ pˣq⁽¹⁻ˣ⁾
where
n = number of trials
x = number of successes
p = probability of getting a success in one trial
q = probability of getting a failure in one trial
q = 1 - p
Given data ,
Let the total number of employees be = 500
Now , the probability of success of selecting employees having children is given by p = 0.60
So , the value of q = 1 - p
q = 1 - 0.60
q = 0.40
So , The probability that exactly 3 of the 4 employees selected will have children is given by binomial distribution formula
where,
P ( x ) = ⁿCₓ pˣq⁽¹⁻ˣ⁾
where
n = number of trials
x = number of successes
p = probability of getting a success in one trial
q = probability of getting a failure in one trial
q = 1 - p
Substituting the values in the equation , we get
P ( x ) = ⁴C₃(0.60)³(0.40)
On simplifying the equation , we get
P ( x ) = 4 x 0.246 x 0.4
P ( x ) = 0.3456
Therefore , the value of P ( x ) is 0.3456
Hence , The probability that exactly 3 of the 4 employees selected will have children is given by binomial distribution formula ⁴C₃(0.60)³(0.40)
To learn more about binomial distribution click :
https://brainly.com/question/29350029
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there are 240 students who attend Elmwood school. Two thirds of the students have brown hair. how many students have brown hair? how many students do not have brown hair?
Answer:
160 has brown hair while
80 do not have brown hair
Step-by-step explanation:
two third means 2/3
therefore to find how many student have brown hair,
we say- 2/3 x 240 = 160
since we know that 160 students have brown hair, we just subtract it from 240
i.e 240 - 160 = 80
A rectangular picture is twice as long as it is wide. If the
area of the picture is 288 in^2, what are its dimensions?
The dimensions of the picture are_____ in long by_____ in wide.
Answer:
24 in long by 12 in wide.
Step-by-step explanation:
l=2w
288=(2w)×w
288=2w^2
144=w^2
12=w
width is 12 inches. Plug that in to find length...
l=2×12
l=24
Need help with this problem
Can someone help me with this please
5 1/4 fraction 2 3/4
73 7/10−25 5/8
Enter your answer as a mixed number in simplest form.
Answer:
48 3/40 just reanswerd for points :>
Step-by-step explanation: