Probability-central limit theorem
A population has the mean of 180 and the standard deviation of 24. A sample of 64 observations will be taken. The probability that the sample mean will be between the 183 and 186 is
a.0.1359
b 0.8185
c. 0.3413
d. 0.4772
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If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10, then the distribution of sample means would have a standard error of __________ .
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If random samples, each with n = 25 scores, are selected from a normal population with u, = 80 and a = 20, and the mean is calculated for each sample, then an average distance between M and u would be.
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