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GuDViN [60]
3 years ago
8

Use the diagram below to solve for x and y. Please help! Fast if possible.

Mathematics
1 answer:
Mila [183]3 years ago
8 0

Answer:

x = 27

y = 29

Step-by-step explanation:

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A study is performed in San Antonio to determine whether the average weekly grocery bill per five-person family in the town is s
bogdanovich [222]

Answer:

No, the sample evidence is not statistically significant (P-value = 0.125).

To reject the null hypothesis, the P-value has to be smaller than the significance level, so the significance level to reject the null hypothesis has to be 0.125 or higher.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

Then, the null and alternative hypothesis are:

H_0: \mu=131\\\\H_a:\mu\neq 131

The significance level is 0.05.

The sample has a size n=50.

The sample mean is M=133.474.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=11.193.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{11.193}{\sqrt{50}}=1.583

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{133.474-131}{1.583}=\dfrac{2.474}{1.583}=1.563

The degrees of freedom for this sample size are:

df=n-1=50-1=49

This test is a two-tailed test, with 49 degrees of freedom and t=1.563, so the P-value for this test is calculated as (using a t-table):

P-value=2\cdot P(t>1.563)=0.125

As the P-value (0.125) is bigger than the significance level (0.05), the effect is  not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

8 0
3 years ago
Tim earns $31 after 2 hours, $46.5 after three hours, and $62 after four hours. Write an equation that represents the amount of
Kazeer [188]

Answer:

y = $15.5x

Step-by-step explanation:

Given that

Tim earns $31 after 2 hours

$46.5 earns after 3 hours,

And, $62 earns after four hours

So first determine the each hour earnings i.e.

= $31 ÷ 2

= $15.5

In two hours it would be $31 and so on

So here the equation would be

y = $15.5x

Here

y = money amount

x = number of hours

4 0
2 years ago
2)<br> AY<br> RA<br> O positive<br> zero<br> O negative<br> O undefined
bezimeni [28]

Answer:

negative

hope it helps;)

8 0
3 years ago
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Plz prove the given equation!!!​
elixir [45]

Answer:

Please see the attached picture for the full solution.

4 0
3 years ago
M and n are parallel lines cut by a transversal.<br> What is the value of x + y?
slava [35]

Answer:

180°

Step-by-step explanation:

It will be answer ...............

8 0
3 years ago
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