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  3. determine confidence intervals for each of the fol

Determine confidence intervals for each of the following: Sample Statistic Sample Size Confidence Level Confidence Interval Lower Boundary Upper Boundary Mean: 150 Std. Dev.: 30 200 95% Percent: 67% 300 99% Mean: 5.4 Std. Dev.:...

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Question

Statistics

Determine confidence intervals for each of the following:

Sample Statistic

Sample

Size

Confidence

Level

Confidence

Interval

Lower

Boundary

Upper

Boundary

Mean: 150

Std. Dev.: 30

200

95%

Percent: 67%

300

99%

Mean: 5.4

Std. Dev.: 0.5

250

99%

Percent: 25.8%

500

99%

Answer & Explanation Solved by verified expert
4.3 Ratings (801 Votes)
In the above questions1we have to find the confidence interval for the populationmeanFor this we can use z distribution since it fulfills theconditions which are as followsThs sample size should be large usuallygreater than 30considered as largeWe must know the population standard deviation which is alsogiven to usThe formula for the confidence interval isFor this wee must know that the critical value of z which can becalculated as followsNOTE We are given confidence level for 95 which canalso    See Answer
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