Question

An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidence that the sample mean is within 4 IQ points of the true mean. Assume that $\sigma$ = 16 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. The required sample size is (Round up to the nearest integer.) Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many grade-point averages must be obtained so that the sample mean is within 0.011 of the population mean? Assume that a 99% confidence level is desired. If using the range rule of thumb, $\sigma$ can be estimated as $\frac{range}{4} = \frac{4 - 0}{4} = 1$. Does the sample size seem practical? The required sample size is (Round up to the nearest whole number as needed.)

          An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of normal adults.
Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99%
confidence that the sample mean is within 4 IQ points of the true mean. Assume that $\sigma$ = 16 and determine the
required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.
The required sample size is 
(Round up to the nearest integer.)
Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many grade-point
averages must be obtained so that the sample mean is within 0.011 of the population mean? Assume that a 99%
confidence level is desired. If using the range rule of thumb, $\sigma$ can be estimated as $\frac{range}{4} = \frac{4 - 0}{4} = 1$. Does the
sample size seem practical?
The required sample size is 
(Round up to the nearest whole number as needed.)

An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of normal adults.
Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99%
confidence that the sample mean is within 4 IQ points of the true mean. Assume that σ = 16 and determine the
required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.
The required sample size is
(Round up to the nearest integer.)
Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many grade-point
averages must be obtained so that the sample mean is within 0.011 of the population mean? Assume that a 99%
confidence level is desired. If using the range rule of thumb, σ can be estimated as (range)/(4) = (4 - 0)/(4) = 1. Does the
sample size seem practical?
The required sample size is
(Round up to the nearest whole number as needed.)

Added by Bruce W.

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