# Practice tests questions, please answer all of them. D49 А B с D E K F...

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practice tests questions,   D49 А B с D E K F G H 11. Which of the following examples would use the z-distribution: 2 3 X = 100; p = 99; s = 5; n = 70 4 X = 7; = 4; s = 1; n = 20 x = 50; p = 53; 0 = 7; n = 15 x = 15; p = 17; O = 3; n = 45 5 6 7 82. Know how to calculate point est., confidence interval, max , tolerable error. Know the effect when you change the 20 confidence level and the sample size. A high school surveyed their graduates on their starting salaries. 300 were returned. The average starting salary of the surveys returned was $32,000 with a standard deviation of$5,000. 12 13 14 15 16 What is the point estimate for the starting salary of 17 the graduates? Hint: One number! 18 29 What is the 95% confidence interval for the average 20 salary of all graduates? Hint: Range 21 22 What is the value of the Maximum Tolerable Error 2 for the above confidence interval?? Sheet1 Sheet Sheets esc FI F2 30 F3 DODFA 2 3 $4 % 5 6 А B C D E F H 18 19 What is the 95% confidence interval for the average 20 salary of all graduates? Hint: Range 21 22 What is the value of the Maximum Tolerable Error 23 for the above confidence interval?? 24 Hint: This is the number that follows +/- in the confidence interval formula. You add it to and subrtact it from the mean! 25 26 27 28 If the level of confidence changes to 99%, and all 29 other variables remain unchanged, what will happen to the confidence interval??? 30 31 32 33 If the number of graduates returning the survey 34 changes from 300 to 700, all other variables 35 remaining unchanged, what will be effected??? (Probability of error? Point estimate? Confidence 37 Interval?) Hint: Only one changes! 36 38 39 3. Know how to calculate sample size: 40 Sheet1 Sheet2 Sheets F1 F2 80 3. Know how to calculate sample size: A restaurant would like to estimate the average$ amount of a 2 take-out order. The standard deviation is $15. If a 99% 3 confidence level and an interval (error) of$5 is desired, how = many customers should be in the sample? Es Hint: The formula is on the formla sheet in the objectives packet. "n=" Learning Objectives PDF page 22 out of 40 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Sheett Sheet2 Sheets + OSC : F2 80 DOO F4 2 # 3 $4 % 5 6 W E R. Ľ Т. ## Answers #### Similar Solved Questions 1 answer ##### Without writing them down, what are the number of subsets of the set A = {a, b, c, d, e} Without writing them down, what are the number of subsets of the set A = {a, b, c, d, e}? Of set B = {a, b, c, d, e, f, g, h, i}?... 1 answer ##### Diverging & Converging LENS The same object (height = y) is placed at several different distances... Diverging & Converging LENS The same object (height = y) is placed at several different distances s to the left of the same lens (focal length = f). For each case, draw the 3 principal rays to locate the image. 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Your factory has been offered a contract to produce a part for a new printer. The contract would last for three​ years, and your cash flows from the contract would be $4.97 million per year. Your upfront setup costs to be ready to produce the part would be$ 7.92 million. Your discount rate f...