7.2.16 Question Help According to a recent survey, the population distribution o

Question

7.2.16 Question Help 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 sample of size 49. Interpret them. c. Repeat (b) for n- 196. Describe the effect of increasing n. O B. The mean of all samples of size 49 k C. 'The expected value for the mean of a sample of size 49 O D. The minimum mean for all samples of size 49 The standard deviation is 2.1- (Type an integer or a decimal.)

Explanation / Answer

a) X is normal distribtuion

b) SD = 15.4 / sqrt(49) = 2.2

c) Mean is 15.9

SD = 15.4 / sqrt(196) = 1.1

As sample size increase the Standard deviation is decrease

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.