Answer True or False. Correct it if false 9. The sum of squares is the best meas

Question

Answer True or False. Correct it if false 9. The sum of squares is the best measure of variability; it takes the original unit of measure into account. T 10. The measure of central tendency refers to closèqessamong data values .11. Relative frequency and probability are not exactly thee.C)1st 12. Iwe sum of squares (SS) 6 &the;#efscores-4 then thestandard deviation 13. The probability values could be greater than one for sure events 14. Random sampling is done by givgach element ynequal chancé of being ) selected. 15. In a positively skewed distribution, the median is, always greater than the 16. The median is preferred to the mean when the datar values ihclude extreme mean. values. 17. Negatively skewed curves are caused by extremely large data val 18. Sumof deviations fromr the mean is always zero. Under a standard normal curve Mean is greater than the Mode. 20. The mean is the only measure of central tendency used for qualitative variables.

Explanation / Answer

Answers

9. False

The standard deviation is the best measure of variability

10. True

11. True

12. False

Standard deviation = SQRT (SS/n - 1) = SQRT (64/4 - 1) = SQRT (64/3) = 4.62

13. False

The probability values is equal to one for sure events.

14. False

Random sampling is done by giving each element equal chance of being selected.

15. False

In a positively skewed distribution, median is always less than the mean.

16. True

17. False

Negatively skewed curves are caused by extremely small data values

18. True

19. False

Under standard normal cure mean is equal to the mode

20. False

The mode is the only measure of central tendency used for qualitative variables

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