BESC 3010 CH7 TEST WITH CORRECT ANSWERS
How is the point estimate affected when the sample standard deviation increases? - Answer-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 f...
BESC 3010 CH7 TEST WITH CORRECT
ANSWERS
How is the point estimate affected when the sample standard deviation increases? -
Answer-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 accurate confidence interval? -
Answer-Sample B
How is a confidence interval affected when the sample standard deviation decreases? -
Answer-It becomes narrower
When the range of confidence for a confidence interval becomes lower - from 90% to
80%, for example - then the confidence interval will... - Answer-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? - Answer-110
As the mean for a distribution increases, then the width of the corresponding confidence
interval will... - Answer-stay 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.) - Answer-(56.71, 63.29)
The sample mean is ________ and a confidence interval for the mean is _______. -
Answer-a descriptive statistic; an inferential statistic
Which is more precise (in the statistical sense): a point estimate or a confidence
interval? - Answer-A point estimate
When we talk about "estimation" in statistics, what is it that is being estimated? -
Answer-A population parameter
What is one important difference between a point estimate and a confidence interval? -
Answer-The confidence interval gives two numbers instead of one
How is a point estimate affected when the sample size increases? - Answer-It does not
change.
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