Two independent samples were selected from a population with mean µ=210 and standard deviation s=100. The...
Two independent samples were selected from a population with mean µ=210 and standard deviation s=100. The first sample, Group 1, included 49 patients, and the second sample, Group 2, had 64 patients. Now, we like to estimate the standard deviations of the means in Group 1 and Group 2. Which of the following answers are right?
| a | Both standard deviations of the means in Group 1 and Group 2 are 100. |
| b | The standard deviations of the means in Group 1 and Group 2 are 100 and 12.5, respectively. |
| c | The standard deviations of the means in Group 1 and Group 2 are 14.3 and 12.5, respectively. |
| d | We don’t have enough information to estimate the standard deviations of the means in Group 1 and Group 2. |
Homework Answers
Standard deviation for group 1 = 
= 14.3
Stadnard deviation for group 2 = 
= 12.5
Option C is correct.
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