Question

Question 16 1 pts A population has a mean of 121 If a random sample of 8 items from the population results in the following sampled values what it the sampling error for the sample? 118 121 97 140 141 127 138 124 Question 17 1 pts A company makes windows for use in homes and commercial buildings. The standards for glass thickness call for the glass to average 0.500 inch with a standard deviation equal to 0.045 inch. Suppose a random sample of n=51 windows yields a sample mean of 0.519 inch. What is the probability of getting a sample mean greater or equal to 0.519, if the windows meet the standards? (Round to four decimal places as needed.)

Answer 1

Question 16 In this population mean (44) = 121 Given data: 118 121 97 140 141 127 138 124 Sample Mean - Exit 118 21+97 +14041417127 +38 +1244 8 Sample Mean x = 125.75 Sampling error = Sample mean - Population mean 125.75-121 4.75 Question 17 In this n=51 = 0.500;Q=0.045 P[X3,0.519] = P 0.519-0.500 0:0451051 - PLZ >3:02] = 0.0013