- #1

MMCS

- 151

- 0

See attached for problem

Working:

Mean: 1203.26

Standard Deviation: 7.047

for 99% confidence interval, level of significance = 0.01

Therefore

0.5 - 0.01/2 = 0.45

Reading 0.45 from standard distribution table i get a value of 1.65

therefore confidence interval should be

1203.26 +/- (1.65*7.047)/√15

1203.26 +/- 3

however using this website to check my answer:

http://www.mccallum-layton.co.uk/tools/statistic-calculators/confidence-interval-for-mean-calculator/

It gives me a value of 5 (approx)

Thanks

Working:

Mean: 1203.26

Standard Deviation: 7.047

for 99% confidence interval, level of significance = 0.01

Therefore

0.5 - 0.01/2 = 0.45

Reading 0.45 from standard distribution table i get a value of 1.65

therefore confidence interval should be

1203.26 +/- (1.65*7.047)/√15

1203.26 +/- 3

however using this website to check my answer:

http://www.mccallum-layton.co.uk/tools/statistic-calculators/confidence-interval-for-mean-calculator/

It gives me a value of 5 (approx)

Thanks

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