If quartile deviation  is to median , what is to mean?

• Mode

• Range

• Standard deviation

• Variance

What is the best measure of typical performance to use when there is a extreme values?

• Mean

• Median

• Mode

• Standard deviation

What measure of central tendency does the number 16 represent in the following data: 14, 15, 17, 16, 19, 20, 16, 14, 16?

• Mean

• Mean and Mode

• Median

• Median and Mode

What is the difference between descriptive and inferential statistics?

• Inferential statistics only concerns the sample while descriptive statistics is concern with the underlying population

• Descriptive statistics is used with discrete variables, inferential statistics is used with continuous variable

• Inferential statistics is used with discrete variables, descriptive statistics is used with continuous variable

• Descriptive statistics only concerns the sample , inferential concerns the underlying population

Which of the following is the greatest weakness of the Range as a measure of variability?

• Extreme in stability

• Ease of computation

• Intricate computation

• Difficulty of interpretation

Which of the following is considered the largest measure of variability from the central tendency of a distribution?

• Average Deviation

• Quartile deviation

• Range

• Standard deviation

Which sets of score has the least variability?

• 0 , 2, 8 , 15 , 20

• 25 , 35 , 45 , 55

• 0 , 5 , 10 , 15 , 20

• 505 , 501 , 503

Which is TRUE when standard deviation is small?

• Scores are spread apart

• Scores are relatively flat

• Scores are toward both extremes

• Scores are tightly bunched together

Here is a score distribution : 98 , 93 , 93, 93, 90 , 88 , 87 , 85 , 85 , 85 , 70 , 51 , 34 , 34 , 34 , 20 , 18 , 15 , 12 , 9 , 8 , 6 , 3 , 1 . Which of the following is the range?

• 34

• 85

• 93

• 97

 

Here is a score distribution : 98 , 93 , 93, 93, 90 , 88 , 87 , 85 , 85 , 85 , 70 , 51 , 34 , 34 , 34 , 20 , 18 , 15 , 12 , 9 , 8 , 6 , 3 , 1 . Which of the following is the characteristic of the distribution?

• Bi-modal

• Clustered around the median

• Scattered around the median

• Tri-Modal