Question

1. except for rounding errors, relative frequencies should add up to what sum? a. 0 b. 1 c. 50 d. 100 complete these statements with the best answers. 12. the three types of frequency distributions are __, , and . 13. in a frequency distribution, the number of classes should be between and . 14. data such as blood types (a, b, ab, o) can be organized into a(n) frequency distribution. 15. data collected over a period of time can be graphed using a(n) graph. 16. a statistical device used in exploratory data analysis that is a combination of a frequency distribution and a histogram is called a(n) . 17. on a pareto chart, the frequencies should be represented on the __ axis.

Explanation:

Step1: Recall relative - frequency concept

Relative frequency of a class is the proportion of data in that class. The sum of all relative frequencies represents the whole data set. Since the whole data set is considered as 100% or 1 in proportion terms, the sum of relative frequencies should be 1.

Step2: Answer question 11

The sum of relative frequencies (except for rounding errors) is 1. So the answer to question 11 is b.

Step3: Answer question 12

The three types of frequency distributions are ungrouped, grouped, and cumulative.

Step4: Answer question 13

In a frequency distribution, the number of classes should be between 5 and 20.

Step5: Answer question 14

Data such as blood types (A, B, AB, O) are categorical data. Categorical data can be organized into a categorical frequency distribution.

Step6: Answer question 15

Data collected over a period of time can be graphed using a time - series graph.

Step7: Answer question 16

A statistical device used in exploratory data analysis that is a combination of a frequency distribution and a histogram is called a stem - and - leaf plot.

Step8: Answer question 17

On a Pareto chart, the frequencies should be represented on the vertical axis.

Answer:

1. b. 1
2. ungrouped, grouped, cumulative
3. 5, 20
4. categorical
5. time - series
6. stem - and - leaf plot
7. vertical