Inside Collection: Collaborative Statistics: Supplemental Course Materials

Summary: This module is a quiz containing 10 multiple choice questions covering topics related to descriptive statistics. This module is part of a set of companion resources to Collaborative Statistics (col10522) by Barbara Illowsky and Susan Dean.

The following table shows the lengths of 64 international phone calls using a $5 prepaid calling card.

Data (minutes) | Frequency | Relative Frequency | Cumulative Relative Frequency |
---|---|---|---|

4 | 25 | 0.3906 | |

14 | 15 | ||

24 | 10 | 0.1563 | |

34 | 9 | 0.1406 | |

44 | 4 | 0.0625 | |

54 | 1 | 0.0156 | 1.0000 |

Using the data, determine which *ONE* of the answers is correct:

**A.**The mean and the median are equal.**B.**The mean is smaller than the median.**C.**The mean is larger than the median.

Interpret the following box plot:

Which of the following is correct?

**A.**75% of the data are at most 5.**B.**There is about the same amount of data from 2-5 as there is from 5-7.**C.**There are no data values of 3.**D.**50% of the data are 4.

In a set of data, if all of the data appear with the same frequency, then:

**A.**The standard deviation is always 0.**B.**The mean is always larger than the standard deviation.**C.**All of the data have the same value.**D.**The boxplot does not always look symmetrical.

The following table shows the lengths of 64 international phone calls using a $5 prepaid calling card.

Data (minutes) | Frequency | Relative Frequency | Cumulative Relative Frequency |
---|---|---|---|

4 | 25 | 0.3906 | |

14 | 15 | ||

24 | 10 | 0.1563 | |

34 | 9 | 0.1406 | |

44 | 4 | 0.0625 | |

54 | 1 | 0.0156 | 1.0000 |

Find the 60th percentile.

**A.**14**B.**60**C.**15**D.**0.2344

Consider the following data set:

• 4; • 6; • 6; • 12; • 18; • 18; • 18; • 200

What value is 2 standard deviations above the mean?

**A.**There is not enough information**B.**Approximately -98**C.**Approximately 102**D.**Approximately 169

Consider the following data:

• 14; • 16; • 16; • 22; • 25; • 38; • 38; • 38; • 38; • 2000

Which of the measures of central tendency would be the *least* useful?

**A.**mean**B.**mode**C.**median

The following table shows the lengths of 64 international phone calls using a $5 prepaid calling card.

Data (minutes) | Frequency | Relative Frequency | Cumulative Relative Frequency |
---|---|---|---|

4 | 25 | 0.3906 | |

14 | 15 | ||

24 | 10 | 0.1563 | |

34 | 9 | 0.1406 | |

44 | 4 | 0.0625 | |

54 | 1 | 0.0156 | 1.0000 |

What percent of the data is either 34 or 44 minutes?

**A.**Approximately 78%**B.**Approximately 13%**C.**Approximately 98%**D.**Approximately 20%

Sixty-four faculty members were asked the number of cars they owned (including spouse's and children's cars). The results are given in the histogram below:

The number of responses that were either "1" or "3" is approximately:

**A.**0.4**B.**27**C.**40**D.**2

Which of the following *DOES NOT* describe the data?

**A.**there are approximately 10 faculy members that own 7 cars**B.**skewed left**C.**There are no values of 5**D.**skewed right

The third quartile is:

**A.**1**B.**2**C.**3**D.**0.75

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