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xz_007 [3.2K]
2 years ago
11

A torist walks 10.5 inches in 3 seconds. how far does it walk per second​

Mathematics
2 answers:
Black_prince [1.1K]2 years ago
6 0

Answer: 31.5

Step-by-step explanation: you multiply the inches by the second.

choli [55]2 years ago
3 0

Divide distance by time:

10.5 inches / 3 seconds = 3.5 inches per second

Answer: 3.5 inches per second

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Suppose we take a random sample of 41 state college students. Then we measure the length of their right foot in centimeters. We
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Answer:

ME = \frac{25.09-21.01}{2}= 1.69

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ME= t_{\alpha/2} \frac{s}{\sqrt{n}}

And for this case the width is:

Width= 2*t_{\alpha/2} \frac{s}{\sqrt{n}}

And if we decrease the confidence level from 95% to 90% then the critical value t_{\alpha/2} would decrease and in effect the width for this new confidence interval decreases.

As confidence level decreases, the interval width decreases

Step-by-step explanation:

For this cae we know that the sample size selected is n =41

And we have a confidence interva for the true mean of foot length for students at a college selected.

The confidence interval is given by this formula:

\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}

And for this case the 95% confidence interval is given by: (21.71,25.09)

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