18.4 18.8 19.2 19.6 20 20.4 20.8 21.2 21.6 22 22.4 22.8 23.2 X B. 18.4 18.8 19.2 19.6 20 20.4 20.8 21.2 21.6 22 22.4 22.8 23.2\fhapter 7 (UNIT 7 MATERIAL) Assignment ECO 250 II 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 _ ' - Select your answer - c ' b. What is the probability that a simple random sample of 75 unemployed individuals will provide a sample mean within 1 week of the population mean? 1:] (to 4 decimals) 1 c. what is the probability that a simple random sample of 75 unemployed individuals will provide a sample mean within 5 week of the population mean? C] (to 4 decimals) Check My Work (3 remaining) 0-; Icon Kev ihapter 7 (UNIT 7 MATERIAL) Assignment ECO 250 o X 5. 0 I 5_ . Barron's reported that the average number of weeks an individual is unemployed is 21 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 21 weeks and that the population standard deviation is 5 7' . weeks. Suppose you would like to select a random sample of 75 unemployed individuals for a follow-up study. Use z-table. 8 . a. Show the sampling distribution of E, the sample mean average for a sample of 75 unemployed individuals. 9. O 13(5) = (to 1 decimal) 10. O 05 = (to 4 deCImals) Choose the correct graph. A