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frosja888 [35]
3 years ago
8

ana hikes at a constant speed.She travels 6 miles in 2 hours. Find her speed in miles per hour.Use it to write an equation for t

he distance ,d, that ana travels in h hours.
Mathematics
1 answer:
labwork [276]3 years ago
6 0
If Ana drove 6 miles in 2 hours, then she drove at a constant speed of 3 miles per hour. 
d/t=s
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Suppose that a random sample of 10 adults has a mean score of 62 on a standardized personality test, with a standard deviation o
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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:

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Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

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Now, find the margin of error M as such

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The upper end of the interval is the sample mean added to M. So it is 62 + 2.08 = 64.08.

The 90% confidence interval for the mean score of all takers of this test is between 59.92 and 64.08. The lower end is 59.92, and the upper end is 64.08.

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