The mean weight of junior high school students is µ = 45 kg. If a random sample of 90 students is selected, find the mean and the standard deviation (sampling error) of the sampling distribution. Assume that the standard deviation is 3.5 kg.
Select one:
mean = 90; standard deviation = 0.3689
mean = 45; standard deviation = 0.3689
mean = 90; standard deviation = 3.5
mean = 45; standard deviation = 3.5
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