1.) a z-score of z=+1.50 indicates a position in a distribution that is located.

Question

1.) a z-score of z=+1.50 indicates a position in a distribution that is located.. a. above the mean by 1.5 points b. at the value that is exactly 1.5 time the population mean c. at the value that is exactly 1.5 time the population standard deviation or d. above the mean by a distance that is exactly 1.5 time the population standard deviation

2.) A z-score of z=-.25 indicates a location is... a. slightly below the mean b. at the center of the distribution c. far below the mean in the extreme left-hand tail of the distrbution d. the location depends on the mean and standard deviation for the distribution

3.) If a population has a mean of u=24 with o=4 and N=10, then Sum (X-u) has a value of... a. 0 b. 16. c. 2.5 d. 400

4.) The median of any distribution corresponds to a z-score of... a. 0 b. 1. c. N d. cant be determined from info given

Explanation / Answer

Answers

1) .D) above the mean by a distance that is exactly 1.5 times of the population standard deviation

2) a) slightly below the mean

3)a)0 because mean deviation about mean is always zero

4)a)0 because z score gives normalize the data hence median is equal to mean equal to zero

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