Next 2 questions are related to the following BINARY population data: 0 0 0 17 T

Question

Next 2 questions are related to the following BINARY population data: 0 0 0 17 T he mean of the binary data is: 0.775 0.770 0.765 0.760 18 The variance of the binary data is: 0.1616 0.1744 0.1824 0.1915 19 The mean of z-scores in a data set a is greater than zero for data sets that have large outlying values. b is zero only when the x-values are balanced around the mean ofx. c is always equal to zero d is always equal to one. The standard deviation of z-scores in a data set a is greater than one for data sets that have large outlying values. b is one only when the x-values are balanced around the mean of x. c is always equal to zero d is always equal to one. 20

Explanation / Answer

Answer 17:

Option A. The mean of the above binary data set is = Sum of items / Number of items = 62 / 80 = 0.775.

Answer 18:

Standard Deviation =( (Item - Mean)^ 2 / n - 1 ) ^ 0.5. Option C.

Answer 3:

Option C. The mean of the z scores in the data set is always equal to zero. Normally distributed population set has a mean value of zero.

Answer 4:

Option D. The standard deviation of z scores in the data set or standard deviation of normally distributed population set is always equal to 1.

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