7. Create a confidence interval for o using the following information: Ages of people driving in the left lane of the freeway with their turn signal permanently on:n= 27, = 70.5 years, s=4.2 years; with 99% confidence. Write a sentence that explains the interval.

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7. Create a confidence interval for o using the following information: Ages of people driving in the left lane of the
freeway with their turn signal permanently on: n= 27, = 70.5 years, s=4.2 years; with 99% confidence. Write a
sentence that explains the interval.
Transcribed Image Text:7. Create a confidence interval for o using the following information: Ages of people driving in the left lane of the freeway with their turn signal permanently on: n= 27, = 70.5 years, s=4.2 years; with 99% confidence. Write a sentence that explains the interval.
8. From the previous problem, how many drivers would you need to survey to estimate a to within 20% of its true
value, using 99% confidence?
Transcribed Image Text:8. From the previous problem, how many drivers would you need to survey to estimate a to within 20% of its true value, using 99% confidence?
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