HELP will give 40 points and brainest

Rebecca is a real estate agent who would like to find evidence supporting the claim that the population mean market value of hou

Effectus [21]

Answer:

There is enough evidence at the α-: 0.05 level of significance to support the claim that the true population mean market value of houses in the neighborhood where Rebecca works is greater than $250,000.

Step-by-step explanation:

We are given that Rebecca randomly selects 35 houses in the neighborhood and finds that the sample mean market value is $259,860 with a sample standard deviation of $24.922.

Let $\mu$ = population mean market value of houses in the neighborhood.

So, Null Hypothesis, $H_0$ : $\mu$ = $250,000 {means that the population mean market value of houses in the neighborhood where she works is equal to $250,000}

Alternate Hypothesis, $H_A$ : $\mu$ > $250,000 {means that the population mean market value of houses in the neighborhood where she works is greater than $250,000}

The test statistics that would be used here One-sample t-test statistics because we don't know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean market value = $259,860

s = sample standard deviation = $24,922

n = sample of houses = 35

So, the test statistics = $\frac{259,860-250,000}{\frac{24,922}{\sqrt{35} } }$ ~ $t_3_4$

= 2.34

The value of t-test statistic is 2.34.

Also, P-value of the test statistics is given by;

P-value = P( $t_3_4$ > 2.34) = 0.0137

Since our P-value is less than the level of significance as 0.0137 < 0.05, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that the population mean market value of houses in the neighborhood where she works is greater than $250,000.

7 0

4 years ago

different video games showing drug usewere observed. The duration times of drug use(in seconds) were recorded. When using this

ehidna [41]

Your question is not complete, however, I have provided answers to it by suggesting that the question goes like this;

Twelve different video games showing drug use were observed. The duration times of drug use (in seconds) were recorded. When using this sample for a t test of the claim that the population mean is greater than 85sec, what does df denote, and what is its value

Answer:

df denote degree of freedom.

degree of freedom df is 11.

Step-by-step explanation:

what does df denote?

df denote degree of freedom

To find it value,

we have twelve different video games showing drug use, then, it means that the sample size "n" is 12

the degree of freedom is 1 < n ( i.e, one less than sample size)

df = n -1 = 12 -1 = 11

So, degree of freedom df is 11.

Note; use your sample size to solve the question as I don't know the exact value you were given. Thanks.

3 0

3 years ago

What is a factor pair?

Ivanshal [37]

a set of two numbers which when multiplied results a correct number

7 0

3 years ago

Read 2 more answers

Brandon used inverse operations to solve an equation in his homework assignment. During which step, if any at all, did Brandon u

tankabanditka [31]

So you types 8x3 then you add. This is because you use PEMDAS on these type of problems

8 0

3 years ago

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA POINTS*.. IM GIVING 40 POINTS !! DONT SKIP :((.

Igoryamba

Answer:76

Step-by-step explanation:

x = 4

y = 76

HOPE THIS HELPS!

8 0

3 years ago

Read 2 more answers