According to a recent survey, the population distribution of number of years of

Question

According to a recent survey, the population distribution of number of years of education for self-employed individuals in a certain region has a mean of 15.4 and a standard deviation of 2.1 a. Identify the random variable X whose distribution is described here. b. Find the mean and the standard deviation of the sampling distribution of x for a random c. Repeat (b) for n- 196. Describe the effect of increasing n. O B. The minimum deviation of the mean for a sample of size 49 sample of size 49. Interpret them. C. The variablility of the mean for samples of size 49 D. The standard deviation of all samples of size 49 c. The mean of the sampling distribution of size 196 is 1. (Type an integer or a decimal.)

Explanation / Answer

b) mean =15.4

std deviation =2.1/(49)1/2 =0.3

c)

mean =15.4

and std deviaiton =2.1/(196)1/2 =0.15

as we increase sample size variability decreases for sampling distribution of mean

( please revert if there are other parts)

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