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POSTTEST 7 BESC 3010- Questions & Answers
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POSTTEST 7 BESC 3010- Questions & Answers
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POSTTEST 7 BESC 3010- Questions &Answers
"Estimation" refers to a class of... Correct Ans-inferential statistics
How is the point estimate affected when the sample standard deviation increases? Correct
Ans-It does not change
Imagine that samples - Sample A with n = 20 and Sample B with n = 200 - are drawn from the
same population and confidence intervals are computed for the same variables, which sample
will likely have the more precise confidence interval? Correct Ans-Sample B
How is a confidence interval affected when the sample standard deviation decreases?
Correct Ans-It become narrower
When the range of confidence for a confidence interval becomes lower - from 90% to 80%, for
example - then the confidence interval will... Correct Ans-It become narrower
What is the point estimate for the population mean if the population standard deviation is 24,
the sample size is 36, and the sample mean is 110? Correct Ans-110
As the mean for a distribution increases, then the width of the corresponding confidence
interval will... Correct Ans-Stays the same
Imagine a sample with n = 49 and a mean of 60 that comes from a population with a standard
deviation of 7. Based on these data, what would be the 99.9% confidence interval for the
population mean? (Use z-score of \pm
±
3.29 for the 99.9% confidence level.) Correct Ans-(56.71, 63.29)
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