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3 years ago

Last year Kerry's take home pay was $15 000. She spent of her take

Mathematics

1 answer:

laiz [17]3 years ago

6 0

Answer:

3,000. You take 15,000 and multiply by .4 to get how much she spent on rent (6,000). They you subtract the rent money from her total pay to get her money that she spent on living expenses, clothes and entertainment in total (9,000). Since she spent her money in six parts (3+2+1), you divide 9,000 by 6 to get 1,500 to get each part. Since for entertainment she has two parts you multiply 1,500 by 2 to get 3,000.

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3 years ago

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pashok25 [27]

Answer:

Test statistics = 2.85

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Step-by-step explanation:

We are given that a sporting goods store believes the average age of its customers is 38 or less.

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Null Hypothesis, $H_0$ : $\mu$ <= 38 years

Alternate Hypothesis, $H_1$ : $\mu$ > 38 years

The test statistics we will use here is;

T.S. = $\frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, X bar = sample mean = 41.6 years

$\sigma$ = population standard deviation = 8 years

n = sample size = 40

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4 years ago