| In a large population of college-educated adults, the mean IQ is 112 with standard deviation 25. Suppose 300 adults from this population are randomly selected for a market research campaign. The distribution of the sample mean IQ is: |
| | approximately Normal, mean 112, standard deviation 25. | | approximately Normal, mean 112, standard deviation 1.443. | | approximately Normal, mean 112, standard deviation 0.083. | | approximately Normal, mean equal to the observed value of the sample mean, standard deviation 25. | |
| In a large population of college-educated adults, the mean IQ is 112 with standard deviation 25. Suppose 300 adults from this population are randomly selected for a market research campaign. The distribution of the sample mean IQ is: |
| | approximately Normal, mean 112, standard deviation 25. | | approximately Normal, mean 112, standard deviation 1.443. | | approximately Normal, mean 112, standard deviation 0.083. | | approximately Normal, mean equal to the observed value of the sample mean, standard deviation 25. | |
Mean ( u ) =112
Standard Deviation ( sd )= 25/ Sqrt(300) = 1.443
| approximately Normal, mean 112, standard deviation 1.443. |
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