MGT 512 Quiz 2.2

Compute the third quartile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22

21. 25

Compute the IQR for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22

9.5

Compute the IQR for the following data. 10, 15, 17, 21, 24, 12, 16, 11, 13, 22.

9.50

Which of the following graphs provides information on outlier and IQR of data set.

Box plot

Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. David has a score of 52 on Ms. Bond's test. Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 6. Steven has a score of 52 on Ms. Nash's test. Which student has the higher standardized score?

David's standardized score is -1.64 and Steven's standardized scores -2.00. Therefore, David has the higher standardized score.

The correlation coefficient will always take values

between -1 and +1.

If covariance between two variables is near 0, it implies that

the variables are not linearly related

Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 9. Steve ha a score of 52. Convert Steve's score to a z-score. (Round to two decimal places if necessary.

-1.33

Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. Michelle has a score of 48. Convert Michelle's score to a z-score. (Round to two decimal places if necessary.)

-2

Compute the 50th percentile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22

15.5

For data having a bell-shaped distribution, approximately --- percent of the data values will be within one standard deviation of the mean.

68

Any data value with a z-score less than -3 or greater than +3 is considered to be a(n)

outlier