You may need to use the appropriate appendix table or technology to answer this question. A researcher reports survey results by stating that the standard error of the mean is 20. The population standard deviation is 480.

(a)How large was the sample used in this survey?

(b)What is the probability that the point estimate was within 35 of the population mean? (Round your answer to four decimal places.)

Consider a finite population with five elements labeled A, B, C, D, and E. Ten possible simple random samples of size 2 can be selected.(a)List the 10 samples beginning with AB, AC, and so on. (Enter your answers as a comma-separated list.)

A= AB, AC, AD, AE, BC, BD, BE, CD, CE, DE

(b)Using simple random sampling, what is the probability that each sample of size 2 is selected? (Enter your probability as a fraction.)

A= 1/10

(c)Assume random number 1 corresponds to A, random number 2 corresponds to B, and so on. List the simple random sample of size 2 that will be selected by using the random digits9, 0,3,7,3,4,2.

A= ?