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Sedaia [141]
2 years ago
10

A scarf takes 20 feet of yarn to make. If 1 foot = 12 inches, how many inches does it take to make the scarf

Mathematics
1 answer:
mestny [16]2 years ago
5 0

Answer:

240

Step-by-step explanation:

20 times 24 is 240

20 x 24 = 240

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In a study of parents' perceptions of their children's size, researchers asked parents to estimate their youngest child's height
tatyana61 [14]

Answer:

Test statistic t=6.505

P-value=0

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that parents tend to underestimate their youngest child's size.

Then, the null and alternative hypothesis are:

H_0: \mu=0\\\\H_a:\mu> 0

The significance level is assumed to be 0.05.

The sample has a size n=39.

The sample mean is M=7.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=7.2.

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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This is due tomorrow PLZ HELP IMMEDIATELY
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The value of X would be 9
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Mrs. Galicia launched a rocket into the air from the top of a building. Answer the following questions based on the graph below:
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Answer:

The first blank is 20 and the second one is 1.25

Step-by-step explanation:

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josiah is taking his friends to the movies each ticket cost $10, and popcorn is $5 a bag. there is a 3$ service fee for the enti
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Answer:

10x+5y+<=75

Step-by-step explanation:

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How much money will the movie theater make if a birthday party of 12 kids each buys a box of candy and a soda but does not go se
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Answer:

$93

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12(3.75+4.00)

= 93

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