1. The 5-number summary for a data set is as follows:

65 9 11 29 81

1. The range of the dataset =
2. The first (lower) quartile =
3. The interquartile range, IQR = and it represents the range of the middle____? % of the data.
4. The 50th percentile =
5. About 75% of the data are greater than
6. There are about____? % of the data between 9 and 11.

2. A computer password is required to be 6 characters long. How many passwords are possible if the password requires 2 letter(s) followed by 4 digits (numbers 0-9), where no repetition of any letter or digit is allowed? There are_______________? possible passwords.

3 .A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y). The results of the regression were: y=bx+a b=1.266 a=29.832 R2=0.891136 a) Use this to predict the number of situps a person who watches 10 hours of TV can do (to 3 decimal places) b) What is the value of the correlation coefficient (to 3 decimal places) ?