can 8you help with both Data Spring 2016 Test No. 2 final Tuesday, May 3, 2016,

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can 8you help with both

Data Spring 2016 Test No. 2 final Tuesday, May 3, 2016, 19.15-21:15 Page 6 Question No. 16c The value, which is used to measure the d terms of standard deviation, is called istance between mean and random variable x in (A) z-value B) variance (C) standard deviation (D) probability of x (E) probability density function of x (F) cumulative distribution function of x (G) None of the above (your answer: /2 Question No. 17cm Find the number z such that 22% of all observations from a standard normal are greater than (A) z 0.6611 /2 z = 0.7722 (C) z= 0.7922 (D) z-0.8111 (E) -0.9122 (F) None of the above (e

Explanation / Answer

Question 16

Correct answer : (A) Z-value

Reason :  Z-value is a measure of how many standard deviations below or above the population mean a raw score is.

Question 17

Correct answer : (B) Z = 0.7722

Reason : P(Z > z ) = 0.22

P(Z < z ) = 0.78

using standard normal tables ,

z = 0.7722

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