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# QNT 275 Week 2 Quiz

QNT 275 Week 2 Quiz -

1

Which of the following pairs of events is mutually exclusive?

• Male and no opinion
• Male and republican
• Female and democrat
• Female and male
• Female and republican

2

We obtain the percentage of a category by:

• multiplying the frequency of that category by 100
• dividing the sum of all frequencies by the frequency of that category
• multiplying the relative frequency of that category by 100
• dividing the frequency of that category by 100

3

You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event?

• At most one of them owns a telephone answering machine.
• Neither of the two owns a telephone answering machine.
• At least one of them owns a telephone answering machine.
• Exactly one of them owns a telephone answering machine.

4

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

• The number of stocks a person owns
• The time spent by a physician with a patient
• The number of persons allergic to penicillin
• The number of days it rains in a month in New York

5

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

• compound event
• multiple outcome
• multinomial sample point
• simple event

6

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 smaller the number of classes
• larger the data set, the larger the number of classes
• smaller the data set, the larger the number of classes