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Juliette [100K]
3 years ago
5

A swimming pool is draining at a constant rate. The table shows the proportional relationship between the change in the water le

vel and the number of hours the pool is draining. Find the constant of proportionality. Then find the change in the water level at 9 hours and at 23 hours of draining.
Draining Swimming Pool
Hours Draining
Change in Water Level​ (in.)
2
3.5
9
​?
17
29.75
23
​?
The swimming pool is draining at a rate of
nothing inches per hour.
​(Type an integer or a​ decimal.)
Enter your answer in the answer box and then click Check Answer.
Mathematics
1 answer:
kaheart [24]3 years ago
6 0

Answer:

first answer:-1.75

second:-15.75

third:-40.25

Step-by-step explanation:i am too lazy srry

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Answer:

Test statistic t=6.505

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Step-by-step explanation:

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The significance level is assumed to be 0.05.

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

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{7.2}{\sqrt{39}}=1.153

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{7.5-0}{1.153}=\dfrac{7.5}{1.153}=6.505

The degrees of freedom for this sample size are:

df=n-1=39-1=38

This test is a right-tailed test, with 38 degrees of freedom and t=6.505, so the P-value for this test is calculated as (using a t-table):

P-value=P(t>6.505)=0

As the P-value (0) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is  enough evidence to support the claim that parents tend to underestimate their youngest child's size.

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Step-by-step explanation:

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Hey there! :)

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