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anzhelika [568]
3 years ago
9

Answer and show proof for brainliest

Mathematics
2 answers:
Yanka [14]3 years ago
8 0
1. add all value together: 24+31+12+38+12+15= 132

2. divide answer by amount of numbers added together: 132/6=22

3. Answer: the mean is 22
kodGreya [7K]3 years ago
3 0

Answer:

12

Step-by-step explanation:

Add each number given = 132

132 / 6 (amount of given numbers)

=12

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Spaulding is the leading maker for basketballs in the US. Spaulding prides itself on the quality that its basketballs have the r
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Answer:

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Step-by-step explanation:

The air pressure of a particular ball has a target value of 7.9 PSI.

This means that the null hypothesis is:

H_{0}: \mu = 7.9

The alternate hypothesis is:

H_{a}: \mu \neq 7.9

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

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Suppose the basketballs have a normal distribution with a standard deviation of 0.20 PSI.

This means that \sigma = 0.2

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pvalue:

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0 < 0.05, which means that we reject the null hypothesis, meaning that the air pressure of the balls is different of the target value of 7.9.

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