Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 2, Problem 97H
Use the following information to answer the neat nine exercises: The population parameters below describe the full-time equivalent number of students FFES) each year at Lake Tahoe Community College from 1976—1977 through 2004—2005.
• 1000 FTES
• median =l,014 FTES
474 FTES
• first
• third quartile = 1,447.5 FTES
• n=29 years
What percent of the FTES were from 528.5 to 1-14’.5? How do you know?
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The population parameters below describe the full-time equivalent number of students (FTES) each year at Lake Tahoe Community College from 1976-1977 through 2004-2005.
•
? = 1000 FTES
•
median = 1,014 FTES
•
? = 474 FTES
•
first quartile = 528.5 FTES
•
third quartile = 1,447.5 FTES
•
n = 29 years
What is the IQR? (Enter your answer as a whole number.)
Body mass index (BMI) is a measure of body composition, which can be used to assess if someone is underweight, healthy weight, overweight but not obese, or obese. It is calculated as a person’s weight (measured in Kilograms) divided by his/her height (measured in meters) squared. We recorded 5 students’ BMI values and the numbers of hours they exercised in the past week, as following:
BMI
18.4
19.6
20.5
27.6
30.6
Hours of exercise
3.0
2.5
4.0
2.7
0.5
What is the value of r?
The following data represent the length of life in years, measured to the nearest tenth, of 100 similar fuel pumps:
3.6 4.1 3.8 3.2 3.9 3.2 2.9 2.0 3.2 2.2
1.4 4.6 4.4 1.8 2.1 3.5 1.9 3.0 2.2 3.6
1.0 4.7 3.5 4.5 2.3 3.2 3.9 3.4 2.5 4.6
3.7 1.8 2.8 1.2 4.3 1.5 1.0 4.9 3.1 2.9
2.6 3.8 1.2 3.9 2.4 2.8 4.0 2.8 3.4 4.5
3.6 1.2 2.3 1.2 3.5 2.5 3.4 3.5 4.9 1.3
4.6 4.5 3.0 1.6 3.8 3.3 3.8 2.3 2.9 3.2
4.4 4.5 1.9 2.9 4.9 2.7 3.3 3.2 1.9 3.1
3.5 4.8 2.6 3.5 2.4 3.5 4.6 2.8 3.9 4.2
4.2 2.8 3.7 3.1 2.9 2.5 4.5 3.4 4.6 2.9
a.
Starting with the lowest value as the first lower class limit, construct a frequency distribution. Note:Use K(Sturges formula) to
estimate the number of classes (do not round-off).
b
Determine the class marks, class boundaries, relative frequency, CF.
Chapter 2 Solutions
Introductory Statistics
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Figure...Ch. 2 - Describe the relationship between the mode and the...Ch. 2 - Describe the relationship between the mean and the...Ch. 2 - Describe the shape of this distribution. Figure...Ch. 2 - Describe the relationship between the mode and the...Ch. 2 - Are the mean and the median the exact same in this...Ch. 2 - Describe the shape of this distribution. Figure...Ch. 2 - Describe the relationship between the mode and the...Ch. 2 - Describe the relationship between the mean and the...Ch. 2 - The mean and median for the data are the same. 3;...Ch. 2 - Which is the greatest, the mean, the mode, or the...Ch. 2 - Which is the least, the mean, the mode, and the...Ch. 2 - Of the three measures, which tends to reflect...Ch. 2 - In a perfectly symmetrical distribution, when...Ch. 2 - Use the following information to answer the next...Ch. 2 - Use the following information to answer the next...Ch. 2 - Two baseball players, Fredo and Karl, on different...Ch. 2 - Use Table 2.57 to find the value that is three...Ch. 2 - Find the standard deviation for the following...Ch. 2 - Student grades on a chemistry exam were: 77, 78,...Ch. 2 - Table 2.61 contains the 2010 obesity rates in U.S....Ch. 2 - Suppose that three book publishers were interested...Ch. 2 - Often, cruise ships conduct all on-board...Ch. 2 - Twenty-five randomly selected students were asked...Ch. 2 - The percentage of people who own at most three...Ch. 2 - If the data were collected by asking the first 111...Ch. 2 - Following are the 2010 obesity rates by U.S....Ch. 2 - The median age for U.S. blacks currently is 30.9...Ch. 2 - Six hundred adult Americans were asked by...Ch. 2 - Given the following box plot: Figure 2.41 a. which...Ch. 2 - The following box plot shows the U.S. population...Ch. 2 - In a survey of 2O-year-olds in China, Germany, and...Ch. 2 - Given the following box plot, answer the...Ch. 2 - Given the following box plots, answer t*...Ch. 2 - A survey was conducted of 130 purchases of new BMW...Ch. 2 - Twenty-five randomly selected students were asked...Ch. 2 - The most obese countries in the world have obesity...Ch. 2 - Table 2.72 gives the percent of children under...Ch. 2 - The median age of the U.S. population in 1980 was...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Use the following information to answer the neat...Ch. 2 - Three students were applying to the same graduate...Ch. 2 - A music school has budgeted to purchase three...Ch. 2 - An elementary school class ran one mile with a...Ch. 2 - The most obese countries in the world have obesity...Ch. 2 - Table 2.76 gives the percent of children under...Ch. 2 - Santa, Clara Country, Ca, has approximately 27,873...Ch. 2 - Javier and Ercilia are supervisors at a shopping...Ch. 2 - What is the IQR? a. 8 b. 11 C. 15 d. 35Ch. 2 - What is the mode? a. 19 b. 19.5 c. 1and 20 d....Ch. 2 - Is this a sample or the entire population? a....Ch. 2 - Twenty-five randomly selected students were asked...Ch. 2 - Forty randomly selected students were asked the...Ch. 2 - Following are the published weights (in pounds) of...Ch. 2 - One hundred teachers attended a seminar on...Ch. 2 - Refer to Figure 2.50 determine which of the...Ch. 2 - In a recent issue of the IFFF Spectrum, 84...Ch. 2 - A survey of enrollment at 35 community colleges...Ch. 2 - Use the following information to answer the next...Ch. 2 - Use the following information to answer the not...Ch. 2 - Suppose that a publisher conducted a survey asking...
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