Chapter 2 Iclicker Questions

Chapter 2 iClicker Questions

1. Frequency table 2-3 shows the counts for graduate advisors according to how many former students of theirs now have top jobs. How many graduate advisors have had six former advisees who now have a top job?

a) 50

b) 4

c) 9

d) 5

2. According to Table 2-3 in Question 1, what is the number of former students now in top jobs that correspond to the highest count of faculty advisors?

a) 13

b) 100

c) 3

d) 4

3. When data cover a huge range (such as countries’ populations) it makes sense to construct a:

a) frequency table.

b) histogram.

c) bar graph.

d) grouped frequency table.

4. What is the difference between histograms and bar graphs?

a) Bar graphs typically provide scores for ordinal data, whereas histograms typically provide scores for ratio data.

b) Bar graphs typically provide scores for nominal data, whereas

histograms typically provide frequencies for interval data.

c) Histograms typically provide scores for nominal data, whereas bar

graphs typically provide scores for interval data.

d) Bar graphs and histograms are completely identical.

5. In a histogram, we label our x-axis with ______and our y-axis with ______.

a) a variable of interest; frequencies

b) frequencies; a variable of interest

c) total cumulative frequency; a variable of interest

d) percentiles; frequencies

6. When constructing a histogram for data in a grouped frequency table, we have to calculate:

a) the midpoint for each interval.

b) the range of scores.

c) the cumulative frequency for each interval.

d) the total of all the frequencies.

7. A frequency polygon:

a) resembles a city skyline.

b) has many criss-crossing lines.

c) is a line graph.

d) is only useful for discrete data sets.

8. All of the following statements about the shape of a normal distribution are true EXCEPT:

a) A normal distribution is bell-shaped.

b) A normal distribution is skewed.

c) A normal distribution has symmetry.

d) A normal distribution is a unimodal curve.

9. The figures below provide examples of skewness. Which diagram may likely be associated with a ceiling effect?

a) figure a

b) figure b

c) both figures

d) neither figure

10. When a distribution of scores has a positive skew this may be evidence of a:

a) normal distribution.

b) bimodal distribution.

c) ceiling effect.

d) floor effect.

11. A graph that displays all of the data points of a variable (or two levels of a variable) both numerically and visually is called

a) a stem-and-leaf plot

b) a bar graph

c) a normal curve

d) a histogram