A population has mean 75 and standard deviation 12. Random samples of size 121 are taken. Find the standard deviation of the sample mean distribution. c. 0.19 a. 1.09 b. 1.90 d. 1.9 How would the answers to part (a) change if the size of the samples were 400 instead of 121? a. 0.60 b. 0.80 c. 0.75 d. 0.70

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A population has mean 75 and standard deviation 12.
Random samples of size 121 are taken. Find the standard deviation of the sample mean distribution.
а. 1.09
b. 1.90
c. 0.19
d. 1.9
How would the answers to part (a) change if the size of the samples were 400 instead of 121?
a. 0.60
b. 0.80
c. 0.75
d. 0.70
Transcribed Image Text:A population has mean 75 and standard deviation 12. Random samples of size 121 are taken. Find the standard deviation of the sample mean distribution. а. 1.09 b. 1.90 c. 0.19 d. 1.9 How would the answers to part (a) change if the size of the samples were 400 instead of 121? a. 0.60 b. 0.80 c. 0.75 d. 0.70
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