Q 100

Amounts spent by a sample of 50 customers at a retail store are summarized in the following relative frequency distribution. The median amount will fall in the following class interval _____________.
A) 0 up to 10
B) 10 up to 20
C) 20 up to 30
D) 30 up to 40

Q 101

The following frequency distribution represents the number of hours studied per week by a sample of 50 students. The mean number of hours studied is ____.
A) 7
B) 8
C) 22.8
D) 480

Q 102

The following frequency distribution represents the number of hours studied per week by a sample of 50 students. The standard deviation of the number of hours studied is ____.
A) 1.89
B) 2.79
C) 3.50
D) 3.56