A sample (X1, X2,..., X70) of size 70 was drawn from a population X. The mean of X is 30 and its variance is 5. What are the mean and the variance of the 70 1 distribution of the sample mean X - Xi? 70 The mean of X is 0.4286, the variance is 0.5976 The mean of is 30, the variance is 0.5976 The mean of is 30, the variance is 0.2673 O The mean of X is 0.4286, the variance is 0.0714 O The mean of X is 30, the variance is 0.0714

MATLAB: An Introduction with Applications
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A sample (X1, X2,..., X70) of size 70 was drawn from a population X. The mean
of X is 30 and its variance is 5. What are the mean and the variance of the
70
1
distribution of the sample mean X
-
Xi?
70
The mean of X is 0.4286, the variance is 0.5976
The mean of is 30, the variance is 0.5976
The mean of is 30, the variance is 0.2673
O The mean of X is 0.4286, the variance is 0.0714
O The mean of X is 30, the variance is 0.0714
Transcribed Image Text:A sample (X1, X2,..., X70) of size 70 was drawn from a population X. The mean of X is 30 and its variance is 5. What are the mean and the variance of the 70 1 distribution of the sample mean X - Xi? 70 The mean of X is 0.4286, the variance is 0.5976 The mean of is 30, the variance is 0.5976 The mean of is 30, the variance is 0.2673 O The mean of X is 0.4286, the variance is 0.0714 O The mean of X is 30, the variance is 0.0714
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