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www-awh.connectmath.com th Lord Huron- Time To Run-YouTube nect MATH Hosted by ALEKS Corp 7.2 Homework Previous12 4 5 6 Next Question 3 of 6(1 point) View problem in a pop-up A meteorologist who sampled 16 thunderstorms found that the average speed at which they traveled across a certain state was 14 miles per hour. The standard deviation of the sample was 1.3 miles per hour. Use a graphing caleulator and round the final answer to one decimal place. 7.2 Section Exercise 12 (calc) Part 1 out of 2 Find the 92% confidence interval of the mean. Assume the variable is normally distributed.

Explanation / Answer

n= 16 mean 14 sd 1.3 92% CI mean+- t(a/2,n-1)*sd/sqrt(n) t(a/2,n-2)= 2.131449546 lower =14-2.131*(1.3/SQRT(16)) 13.30743 upper =14+2.131*(1.3/SQRT(16)) 14.69258

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