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 95% confident that the sample standard deviation s is within 20% of g. Is this sample size practical? To be 95% confident that s is within of the value of g, the sample size n should be at least * To be 99% confident that s is within of the value of 6, the sample size n should be at least 1% 5% 10% 20% | 30% 40% | 50% 19,205 768 192 48 21 12 8 1% 5% 10% 20% 30% 40% 50% 33,218 1,336 336 85 38 22 14 The minimum sample size needed is Is this sample size practical? O A. No, because the sample size is excessively large to be practical for most applications. O B. Yes, because the sample size should be as large as possible for most applications. O C. No, because the sample size should be as small as possible for most applications. O D. Yes, because the sample size is small enough to be practical for most applications.

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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 95% confident that the sample standard
deviation s is within 20% of g. Is this sample size practical?
To be 95% confident that s is
within
of the value of g, the sample size
n should be at least
* To be 99% confident that s is
within
of the value of 6, the sample size
n should be at least
1%
5% 10% 20% | 30% 40% | 50%
19,205 768 192
48
21
12
8
1%
5% 10% 20% 30% 40% 50%
33,218 1,336 336
85
38
22
14
The minimum sample size needed is
Is this sample size practical?
O A. No, because the sample size is excessively large to be practical for most applications.
O B. Yes, because the sample size should be as large as possible for most applications.
O C. No, because the sample size should be as small as possible for most applications.
O D. Yes, because the sample size is small enough to be practical for most applications.
Transcribed Image Text: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 95% confident that the sample standard deviation s is within 20% of g. Is this sample size practical? To be 95% confident that s is within of the value of g, the sample size n should be at least * To be 99% confident that s is within of the value of 6, the sample size n should be at least 1% 5% 10% 20% | 30% 40% | 50% 19,205 768 192 48 21 12 8 1% 5% 10% 20% 30% 40% 50% 33,218 1,336 336 85 38 22 14 The minimum sample size needed is Is this sample size practical? O A. No, because the sample size is excessively large to be practical for most applications. O B. Yes, because the sample size should be as large as possible for most applications. O C. No, because the sample size should be as small as possible for most applications. O D. Yes, because the sample size is small enough to be practical for most applications.
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