FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 2: Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 1

Multiple Choice

Review LaterAdd Note

Review Later

For a single variable at the interval-ratio level,an appropriate graph would be

A) a pie chart.
B) a histogram.
C) a bivariate table.
D) None of the above.Graphs are never used for interval-ratio level variables

Correct Answer

verified

Show Answer

Question 2

Multiple Choice

Review LaterAdd Note

Review Later

A city of 1567 people had 34 auto thefts last year.The auto theft rate for this city

A) cannot be determined from the information given
B) is falling
C) is (34/1567) ´ 100,000
D) is (100,000 ´ 1567) /34

Correct Answer

verified

Show Answer

Question 3

Multiple Choice

Review LaterAdd Note

Table 2.2 $\begin{array}{|l|l|l|}\hline \text {TABLE 2.2 AGES OF}\\\text {RESPONDENTS}\\\hline \text { ClassIntervals } & \text { Frequency } & \text { Percentages } \\\hline 18-23 & 5 & \\\hline 2429 & 21 & \\\hline 30-40 & 10 & \\\hline \text { TOTAL } & 36 & \\\hline\\\end{array}$ In Table 2.2,what proportion of cases are 18-23?

Table 2.1 $\begin{array}{|l|l|l|}\hline \underline { \text { TABLE 2.1 POLITICAL PARTY }}\\\underline { \text { MEMBERSHIP IN TWO }}\\\underline { \text { COMMUNITIES}}\\ \hline \text { PARTY: } & \text { COMMUNITY A } & \text { COMMUNITY B } \\\hline \text { Republican } & 103 & 17 \\\hline \text { Democrat } & 135 & 21 \\\hline \text { Independent } & 17 & 15 \\\hline \text { Socialist } & 9 & 11 \\\hline \text { TOTALS: } & 264 & 64\\\hline\\\end{array}$ In Table 2.1,what percentage of Community A are Republicans?

A possible problem with open-ended or unequal intervals is that they

When working with a very small number of cases,it is usually preferable to report

A nation had a birth rate of 20 in 1990.The rate fell to 13 in 2000.What was the percentage change?

When constructing a frequency distribution,the number of class intervals,in general,should be

City A (population = 1567 people) had 34 auto thefts last year.City B (population = 34,567) had 40 auto thefts in the same time period and City C (population = 156,980) had 70 auto thefts.Which city had the highest RATE of auto theft?

The ratio of men to women in a karate class is 3.3:1.If there are 100 women,how many men are there?

Histograms and line charts or frequency polygons are used with data measured at the

Open-ended intervals

The class intervals below represent ages of respondents.Which set of intervals is both exhaustive and mutually exclusive?

Table 2.1 $\begin{array}{|l|l|l|}\hline \underline { \text { TABLE 2.1 POLITICAL PARTY }}\\\underline { \text { MEMBERSHIP IN TWO }}\\\underline { \text { COMMUNITIES}}\\ \hline \text { PARTY: } & \text { COMMUNITY A } & \text { COMMUNITY B } \\\hline \text { Republican } & 103 & 17 \\\hline \text { Democrat } & 135 & 21 \\\hline \text { Independent } & 17 & 15 \\\hline \text { Socialist } & \underline 9 & \underline {11} \\\hline \text { TOTALS: } & 264 & 64\\\hline\\\end{array}$ In Table 2.1,what is the ratio of Independents to Socialists in Community A?

Below are the scores of 25 students on a midterm test.Organize this information into a frequency distribution using a ten point grading scale for class intervals.Include columns for percentages and cumulative percentages.Write a brief description of the distribution. $\begin{array}{lllll}35 & 45 & 65 & 75 & 87 \\80 & 69 & 71 & 53 & 90 \\99 & 95 & 70 & 82 & 73 \\93 & 67 & 61 & 57 & 74 \\72 & 77 & 71 & 81 & 83\end{array}$

To be converted to a percentage,the proportion must be multiplied by

Cumulative frequencies and cumulative percentages allow a researcher to

For the following stated limits: 23-30 31-38 39-46 What are the real limits?

Proportions and percentages,ratios and rates are all ways of expressing

As a very general rule,frequency distributions should have ____ categories.