# QNT 275 Week 2 Quiz

QNT 275 Week 2 Quiz

The number of classes in a frequency distribution depends on the size of the data set. In general, the:

number of classes should be equal to the number of values in the data set divided by 5

larger the data set, the larger the number of classes

larger the data set, the smaller the number of classes

smaller the data set, the larger the number of classes

Which of the following pairs of events is mutually exclusive?

Female and male

Female and republican

Male and republican

Male and no opinion

Female and democrat

Which of the following is not an example of a discrete random variable?

The number of persons allergic to penicillin

The time spent by a physician with a patient

The number of days it rains in a month in New York

The number of stocks a person owns

We obtain the percentage of a category by:

dividing the frequency of that category by 100

dividing the sum of all frequencies by the frequency of that category

multiplying the frequency of that category by 100

multiplying the relative frequency of that category by 100

You toss a coin nine times and observe 3 heads and 6 tails. This event is a:

compound event

multinomial sample point

multiple outcome

simple event