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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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%

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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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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%