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QNT 275 Week 2 Quiz

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

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