The Orangetheory Fitness group of fitness studios released a study that claims 30% of its members prefer aerobic exercises, 50% of its members prefer strength training and 20% preder group exercise sessions. The manager of an Orangetheory Fitness studio performed a survey on 80 members and found the frequencies shown below. She would like to know if her studio's composition follows the same distribution pattern as the claimed one.

Preference Aerobics Strength Group Exercise

Frequency 32 38 10

The value of the chi-square test statistic you would use in testing whether there is a difference from the claimed pattern is

a.

None of the above

b.

7.54

c.

9.76

d.

5.02

e.

4.22