chapter 2

State the problem with this simple frequency distribution. Intervals Frequency 8-10...4 6-8...7 4-6...3 2-4...6 0-2...9 A) The interval width is too small. B) The interval width is unequal. C) The class intervals overlap. D) The number of intervals is too small.

C. The class intervals overlap

The range of scores in each interval of a grouped frequency distribution is called... A) simple frequency B) interval width C) real range D) grouped data

B. interval width

The three steps for constructing a simple frequency distribution are... A) find the observed range, find the interval width, and construct the frequency distribution B) find the real range, count the scores, and construct the frequency distribution C) find the real range, find the interval width, and construct the frequency distribution D) all of the above

C. find the real range, find the interval width, and construct the frequency distribution

Fill in the missing values for A and B in this frequency distribution table: Intervals Frequency 6.0-6.6 12 5.3-5.9 7 4.6-5.2 B 3.9-4.5 10 A-3.8 8 total...50 A) A = 3.2, B = 13 B) A = 3.1, B = 14 C) A = 3.3, B = 13 D) There is not enough information to complete this table.

A. A=3.2, B=13

A relative frequency distribution is appropriate when... A) there are large frequency counts in each interval B) the data are grouped into relatively small intervals C) there are open classes D) the interval width is too large

A. there are large frequency counts in each interval

State the type of graphical display for Graph A and Graph B. A) A is a bar chart; B is a histogram. B) B is a bar chart; A is a histogram. C) Both graphs are bar charts. D) Both graphs are histograms.

B. B is a bar chart, A is a histogram histograms connect to each other bar charts do not

Ungrouped data can be distributed as... A) intervals B) categories C) upper and lower boundaries D) all of the above

B. categories

A ________ is plotted at the midpoint of each interval, whereas a ________ is plotted at the upper boundary of each interval. A) histogram; bar chart B) frequency polygon; histogram C) frequency polygon; ogive D) histogram; frequency polygon.

C. frequency polygram, ogive

To determine the interval width, we divide the ________ by the number of intervals. A) observed range B) exclusive range C) real range D) all of the above

C. real range

A researcher distributes frequencies into the following classes: absent, tardy, present. What type of data are distributed? A) nominal data B) qualitative data C) ungrouped data D) all of the above

D. all of the above

When cumulating frequencies from the bottom up, the data are discussed in terms of... A) at most B) less than C) at or below D) all of the above

D. all of the above