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1 You draw a random sample ofsizen=16 from a population with mean μ 100 and standard deviation ơ 20. [2] The mean of the sample means: and the standard deviation ơi of the sample means are respectively a. 98, 18 b. 100, 20 c. 100,5 d. impossible to determine (ii) [1] Approximately what is the probability that the sample mean is between 95 and 105? a. 0.6826 b. 0.1974 c. 0.5861 d. 0.9876 (ii) [1] what must be true regarding the distribution of the population in order to compute probabilities regarding the sample mean? (i.e. to solve question (ii) above) (iv)[I] Assuming the requirements in part (ii) are satisfied, describe the shape of the sampling distribution of the mean (v) [2] What would the mean of the sample means and the variance of sample means have been if the samples had been of size 50, still drawn from a population with μ-100 and σ-20?
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