Question 1

In a cumulative frequency distribution table, the cf at the top

Accepted Answer

A)  gives the total sum of all of the scores. 
B)  gives the relative frequency for that particular score. 
C)  is equal to N. 
D)  is equal to the percentile rank.

Question 2

The most frequently occurring scores are in the middle in a __________________ distribution.

Accepted Answer

A)  normal 
B)  positively skewed 
C)  negatively skewed 
D)  rectangular

Question 3

In a distribution of US salaries, most are at the lower end and there are fewer who make high salaries. This describes a _______________ distribution.

Accepted Answer

A)  normal 
B)  negatively skewed 
C)  positively skewed 
D)  bimodal

Question 4

Which of the following is NOT true of the normal distribution curve?

Accepted Answer

A)  It has tails that are asymptotic. 
B)  It is based on an infinite number of cases. 
C)  It begins with a frequency of 0. 
D)  The tails never touch the baseline.

Question 5

Which type of graphs are appropriate for data measured on interval and ratio scales?

Accepted Answer

A)  bar graphs and histograms 
B)  frequency polygons and bar graphs 
C)  histograms and frequency polygons 
D)  bar graphs, histograms, and frequency polygons

Question 6

Which type of graph is best for making comparisons between two sets of data?

Accepted Answer

A)  frequency polygons 
B)  histograms 
C)  percentile ranks 
D)  bar graphs

Question 7

If a test is very easy, the shape of the distribution will be

Accepted Answer

A)  normal. 
B)  negatively skewed. 
C)  positively skewed. 
D)  bimodal.

Question 8

Which of the following is true of bar graphs?

Accepted Answer

A)  They are used for quantitative variables that differ in kind. 
B)  They can be used for data measured on interval or ratio scales. 
C)  The bars touch each other to reflect the continuous nature of the variable being measured. 
D)  The bars are spatially separated.

Question 9

The ground rules in your text specify that the size of class intervals should be

Accepted Answer

A)  2, 3, or 5. 
B)  2, 3, or 4. 
C)  3, 5, or 10. 
D)  10 or 20.

Question 10

Which type of graph uses dots rather than bars?

Accepted Answer

A)  bar graphs 
B)  histograms 
C)  percentile ranks 
D)  frequency polygons

Question 11

Empirical distributions are

Accepted Answer

A)  theoretical. 
B)  based on the mathematical probability of the frequencies of scores in a population. 
C)  based on actual frequencies of scores. 
D)  drawn with smooth lines without dots.

Question 12

In a normal distribution curve

Accepted Answer

A)  the most frequently occurring scores are toward the right side. 
B)  the most frequently occurring scores are in the middle. 
C)  the most frequently occurring scores are towards the left side. 
D)  the scores are distributed equally across the entire distribution.

Question 13

In a negatively skewed distribution that ranges from 0 to 50, the least frequently occurring scores will be nearest to

Accepted Answer

A)  10. 
B)  30. 
C)  40. 
D)  50.

Question 14

A bar graph should be used for illustrating which of the following data?

Accepted Answer

A)  types of cars 
B)  blood pressures 
C)  heights of children 
D)  running speed

Question 15

Which of the following is NOT true of histograms.

Accepted Answer

A)  They are used for quantitative variables that differ in kind. 
B)  They can be used for data measured on interval or ratio scales. 
C)  The bars touch each other to reflect the continuous nature of the variable being measured. 
D)  The bars are spatially separated.

Question 16

The ground rules in your text specify that the number of class intervals should be

Accepted Answer

A)  between 5 and 10. 
B)  between 10 and 20. 
C)  2, 3, or 5. 
D)  5, 10, or 20.

Question 17

Which of the following is NOT true of bar graphs?

Accepted Answer

A)  They are used for qualitative variables that differ in kind. 
B)  They are used for quantitative variables that differ in amount. 
C)  The bars are spatially separated. 
D)  They can be used for data measured on nominal or ordinal scales.

Question 18

How are bar graphs different from histograms?

Accepted Answer

The answer of How are bar graphs different from histograms?...

Question 19

In a positively skewed distribution of scores that ranges from 0 to 100, the most frequently occurring scores will be nearest to

Accepted Answer

A)  20. 
B)  40. 
C)  60. 
D)  80.

Question 20

If the range in a distribution of scores is 63, we should use an i of

Accepted Answer

A)  2. 
B)  3. 
C)  5. 
D)  10.

Exam 2: Organizing Data Using Tables and Graphs