K- Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 1% of a. Is this sample size practical? To be 95% confident that s is
K- Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 1% of a. Is this sample size practical? To be 95% confident that s is
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Transcribed Image Text:K
Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed
to be 99% confident that the sample standard deviation s is within 1% of o. Is this sample size practical?
To be 95% confident that s is
within
of the value of o, the sample size
In should be at least
G
To be 99% confident that s is
within
of the value of o, the sample size
In should be at least
The minimum sample size needed is
Is this sample size practical?
1% 5% 10% 20% 30% 40% 50%
19,205 768
192 48 21
12
85
8
1% 5% 10% 20% 30% 40% 50%
33,218 1,336 336
38 22 14
OA. Yes, because the sample size should be as large as possible for most applications.
OB. No, because the sample size should be as small as possible for most applications.
OC. No, because the sample size is excessively large to be practical for most applications.
O D. Yes, because the sample size is small enough to be practical for most applications.
Expert Solution
Step 1
It is given that
Level of confidence = 99%
Margin of error = 1%
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