The sum of all the relative frequencies of any distribution equals a. 0 b. 1 c.

Question

The sum of all the relative frequencies of any distribution equals a. 0 b. 1 c. 2 d. 3 What is the value of the median of the following scores? X = 1, 2, 3, 3, 3, 4, 5, 7, 10, 30, 86 a. 3 b. 4 c. 5 d. all of the above What is the value of the mode of the scores in problem 7? a. 3 b. 4 c. 5 d. all of the above What is the value of the mean of the scores in problem 7? a. 14. b.11 c. 154 d. all of the above Which central tendency is most appropriate to report for the scores in problem 7? a. mean b. mode c. median d. standard deviation What is the value of the estimated population standard deviation of the following set of scores? (This is the standard deviation weve computed many times since chapter 5) X = 12, 16, 18, 18, 20, 24 a. 2 b. 4 c. 10 d. 16

Explanation / Answer

Q.6 sum of all relative freuqecies of any distribution is equal to 1. (option B)

Q.7 Median of the given scores, as there are 11 scores are in the data so 6th number pointwill be the median

so 4 is the median

Q.8 Mode is the value which have the highest freuency or which repeats the most so here Mode = 3

Q.9 Mean of the above given data = sum of all values/ number o valus = 154/ 11 = 14

Q. 10 Here median is used as central tendency because the data is heavily skewed.

Q.11 Standard deviation of the given data values

X= 12,16, 18, 18, 20 , 24

Here mean = 18

Variance = [(12-18)2 + (16-18)2 +(18-18)2 + (18-18)2 + (20-18)2 + (24-18)2 ]/5 = 80/5 = 16

Std. Deviation = Sqrt (Variance) = sqrt(16) =4

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