- Description
QNT 275 Week 2 Quiz
- Correct answerquestion1
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
- Correct answerquestion2
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
- Ccrrect answerquestion3
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
- Ccrrect answerquestion4
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
- Ccrrect answerquestion5
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
- Ccrrect answerquestion6
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.