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kherson [118]
3 years ago
5

A chicago clubs baseball cap costs 30$. Micheal has a coupon that will save him 30% of the price. How much money will Micheal pa

y for the cap.
Mathematics
1 answer:
Kazeer [188]3 years ago
3 0

Answer:

The discounted price is $21

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approx. 25.13

Step-by-step explanation:

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Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis
alex41 [277]

Answer:

a) The 95% confidence interval to estimate the average fee for the population is between $11.65 and $12.79

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Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

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M = z*\frac{\sigma}{\sqrt{n}}

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M = 1.96*\frac{1.86}{\sqrt{41}} = 0.57

So the answer for b) is $0.57.

The lower end of the interval is the sample mean subtracted by M. So it is 12.22 - 0.57 = $11.65

The upper end of the interval is the sample mean added to M. So it is 12.22 + 0.57 = $12.79

The 95% confidence interval to estimate the average fee for the population is between $11.65 and $12.79

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