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In a random sample of 23 people, the mean commute time to work was 30.3 minutes...

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Basic Math

In a random sample of 23 people, the mean commute time to workwas 30.3 minutes and the standard deviation was 7.1 minutes. Assumethe population is normally distributed and use a? t-distribution toconstruct a 98?% confidence interval for the population mean .Whatis the margin of error of f ??? Interpret the results.

(a)The confidence interval for the population mean is _,_   ?(Round to one decimal place as? needed.)

(b)The margin of error is _ ?(Round to two decimal places as?needed.)

(c) Interpret the results. Choose the correct answer below:

1. It can be said that 95?% is between the bounds of theconfidence interval.

2.With 95?% confidence, it can be said that the population meanis between the bounds of the confidence interval.

3.With 95?% confidence, it can be said that is between thebounds of the confidence interval.

4.If a large sample is taken approximately 95?% of them arebetween the bounds of the confidence interval.

Answer & Explanation Solved by verified expert
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Solution Given thata Point estimate sample mean 303sample standard deviation s 71sample size n    See Answer
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