/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q21 Cumulative Frequency Distributio... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Q21 (page 50)

Cumulative Frequency Distributions. In Exercises 21 and 22, construct the cumulative frequency distribution that corresponds to the frequency distribution in the exercise indicated.

Exercise 5 (Age of Best Actress When Oscar Was Won)

Short Answer

Expert verified

The cumulative frequency distribution is constructed as follows:

Age (in years)

Cumulative Frequency

Less than 30

29

Less than 40

63

Less than 50

77

Less than 60

80

Less than 70

85

Less than 80

86

Less than 90

87

Step by step solution

01

Given information

Thegrouped frequency distribution of the ages (in years) of the best actress when the Oscar was won is given.

02

Cumulative frequency

The cumulative frequency distribution is obtained by adding the frequencies of successive classes. It represents the sum of all frequencies of a class interval equal to and less than it.

03

Calculation

The table below shows the frequencies of ages (in years) of the best actress when Oscar was won:

Age (in years)

Frequency

20-29

29

30-39

34

40-49

14

50-59

3

60-69

5

70-79

1

80-89

1

To construct the cumulative frequency distribution, the first class interval should be changed to less than the lower limit of the second class interval; the second class interval should be changed to less than the lower limit of the third class interval, and so on.

The cumulative frequencies corresponding to the classes are obtained as shown below:

Age (in years)

Frequency

Cumulative Frequency

Less than 30

29

29

Less than 40

34

34 + 29 = 63

Less than 50

14

14 + 63 = 77

Less than 60

3

3 + 77 = 80

Less than 70

5

5 + 80 = 85

Less than 80

1

1 + 85 = 86

Less than 90

1

1 + 86 = 87

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Categorical Data. In Exercises 23 and 24, use the given categorical data to construct the relative frequency distribution.

Births Natural births randomly selected from four hospitals in New York State occurred on the days of the week (in the order of Monday through Sunday) with these frequencies: 52, 66, 72, 57, 57, 43, 53. Does it appear that such births occur on the days of the week with equal frequency?

Linear Correlation Coefficient In Exercises 9鈥�12, the linear correlation coefficient r is provided. Use Table 2-11 on page 71 to find the critical values of r. Based on a comparison of the linear correlation coefficient r and the critical values, what do you conclude about a linear correlation?

Using the data from Exercise 5 鈥淏rain Volume and IQ,鈥� the linear correlation coefficient is r = 0.127.

Health Test In an investigation of a relationship between systolic blood pressure and diastolic blood pressure of adult females, which of the following graphs is most helpful: histogram; pie chart; scatterplot; stemplot; dot plot.

Frequency Distribution of Body Temperatures Construct a frequency distribution of the 20 body temperatures (oF) listed below. (These data are from Data Set 3 鈥楤ody Temperatures鈥� in Appendix B.) Use a class width of 0.5oF and a starting value of 97.0oF.

97.1 97.2 97.5 97.6 97.6 97.8 98.0 98.0 98.2 98.2 98.2 98.3 98.4 98.6 98.6 98.7 98.7 98.9 99.1 99.4.

Deceptive Graphs. In Exercises 17鈥�20, identify how the graph is deceptive.

Self-Driving Vehicles In a survey of adults, subjects were asked if they felt comfortable being in a self-driving vehicle. The accompanying graph depicts the results (based on data from TE Connectivity).
See all solutions

Recommended explanations on Math Textbooks

Mechanics Maths

Read Explanation

Pure Maths

Read Explanation

Applied Mathematics

Read Explanation

Geometry

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Probability and Statistics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.