ISYS 5503: CH 2b

You would like to compare students' grades (A, B, C, D, F) in an Economics class to their grades in a Statistics class. Which method would be appropriate A. Crosstabulation B. A bar graph C. A dot plot

A. Crosstabulation

Read left to right, an ogive can never decrease. A. True B. False

A. True

The last entry in a cumulative relative frequency distribution is always one. A. True B. False

A. True

When using a scatter diagram, both variables must be quantitative A. True B. False

A. True

A histogram is appropriate when summarizing A. quantitative data B. qualitative data

A. quantitative data

Grade Frequency A 10 B 15 C 15 D 7 F 3 50 What is the relative frequency of the D grade? A. 0.07 B. 0.14 C. 7 D. 14 E. 50.4

B. 0.14 7/50

Grade Frequency A 10 B 15 C 15 D 7 F 3 50 What is the relative frequency of the B grade? A. 0.15 B. 0.30 C. 30 D. 108 E. None of the above

B. 0.30 15/50

Define ogive A. A percent frequency distribution B. A graph of a cumulative distribution C. A tabular summary of data for two variables D. The beginning of the song "Home on the Range."

B. A graph of a cumulative distribution

When using crosstabulation, both variables must be quantitative. A. True B. False

B. False

A bar graph is appropriate when summarizing A. quantitative data B. qualitative data

B. qualitative data

A sample of ten price/earnings ratios for companies in the Services sector follows. 37 11 14 17 12 21 24 17 28 30 If a stem-and leaf display were constructed for this sample, how many leaves would there be for the "3" stem? A. 0 B. 1 C. 2 D. 3

C. 2

Grade Frequency A 10 B 15 C 15 D 7 F 3 50 When constructing a pie chart, how many degrees would be in the section of the pie showing the F grade? A. 0.06 B. 6 C. 21.6 D. None of the above

C. 21.6 3/50 x 360

If you were to summarize the birth month (January, February, March, ...) of the students in your dorm, which method would be appropriate? A. An ogive B. A stem-and-leaf display C. A bar graph D. None of the above

C. A bar graph

If a scatter diagram shows a negative relation then, in general, as A. x increases, y increases B. y increases, x increases C. x increases, y decreases D. None of the above

C. x increases, y decreases

To summarize two variables simultaneously, one could use which of the following? A. Crosstabulation B. An ogive C. A scatter diagram D. Either a or c E. None of the above

D. Either a or c