CH5: A population of scores has u = 126. In this population, a score of X = 138 corresponds to z = 2.5. What is the population standard deviation? O a. 65 Оb. 103 Oc. 4 d. 5 e. none of the options

You will need a z table and ONE of the z score formulas for this question. Pretend there is pre-employment test with normally distributed scores and a mean =50 and standard deviation =10. What score would you have to get on the test to score in the top or highest 1%?        A. 73.25   B. 75   C. 78   D. 50.25

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ssume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test).  Find the following:                                                                                                         The Z-value that separates the bottom 18% from the others.                                                                                                         The Z-Value for the 95 percentile.                                                                                                         What is the IQ score that separates the bottom 18% from the others?                                                                                                         The 95 percentile is? A. 113.725 B. -.92 C. 75.325 D. -.915 E. 1.645 F. 86.275 G. 124.675 H. .915

Solve the problem. Round to the nearest tenth. min one region, the September energy consumption levels for single family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. Find which is the consumption level separating the bottom 45% from the top 55%.

Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find P15, the 15th percentile. This is the bone density score separating the bottom 15% from the top 85%. Which graph represents P15? Choose the correct graph below. O A. 1 P15 Q The bone density score corresponding to P15 is (Round to two decimal places as needed.) B. P15 Q Q -C*** O C. A P15 O D. A P15 Q

K mly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find P2. the 2nd percentile. This is the bone density score separating the bottom 2% from the top 98%. Which graph represents P₂? Choose the correct graph below. O A. OB. The bone density score corresponding to P₂ is. (Round to two decimal places as needed.) P₂ O C. P2 Q O D. P₂

Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find P, the 11th percentile. This is the bone density score separating the bottom 11% from the top 89%. Which graph represents P ? Choose the correct graph below. O A. O B. OD. P11 P11 P11 P11 The bone density score corresponding to P1 is (Round to two decimal places as needed.) Click to select your answer(s). APR tv MacBook Air F9 F10 LLA 20 F3 F6 F8 F4 F5 F1 F2 & #3 7 8. %24

I’ve already posted this one, but I’m posting it again, because I need to be shown what to input into my TI-84 Plus calculator to solve.

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