Exam 2: Organizing Data
Exam 1: The Nature of Statistics88 Questions
Exam 2: Organizing Data169 Questions
Exam 3: Descriptive Measures195 Questions
Exam 4: Probability Concepts133 Questions
Exam 5: Discrete Random Variables163 Questions
Exam 6: The Normal Distribution144 Questions
Exam 7: The Sampling Distribution of the Sample Mean76 Questions
Exam 8: Confidence Intervals for One Population Mean84 Questions
Exam 9: Hypothesis Tests for One Population Mean58 Questions
Exam 10: Inferences for Two Population Means103 Questions
Exam 11: Inferences for Population Standard Deviations101 Questions
Exam 12: Inferences for Population Proportions104 Questions
Exam 13: Chi-Square Procedures74 Questions
Exam 14: Descriptive Methods in Regression and Correlation55 Questions
Exam 15: Inferential Methods in Regression and Correlation41 Questions
Exam 16: Analysis of Variance Anova71 Questions
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A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogramfor the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer thequestion. The blood pressure readings were given to the nearest whole number.
-Approximately what percentage of the people aged 25-40 had a systolic blood pressure reading between 110 and 139 inclusive?
(Multiple Choice)
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Complete the contingency table and use it to solve the problem.
-The partially filled contingency table gives the frequencies of the data on age (in years)and sex from the residents of a retirement home.
What is the relative frequency for females in the age group 60-69?
(Multiple Choice)
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Use single-value grouping to organize these data into a frequency distribution.
-A teacher asked each of her students how many novels they had read in the previous six months. The results are shown below. 0 1 5 4 2 1 3 2 2 7 2 5 0 1 0 1 1 2 6 0 2 3 1 2 7 1 4 2 3 1 7 0 0 2 1 1 0 6 1 7
Construct a frequency distribution for the number of novels read.
(Multiple Choice)
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The total number of phone calls a sales representative makes in a month is 425.
(Multiple Choice)
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A graphical display of a data set is given. State whether the distribution is (roughly)symmetric, right skewed, or leftskewed.
-A relative frequency histogram for the heights of a sample of adult women is shown below.
.
(Multiple Choice)
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The partially filled contingency table gives the relative frequencies of the data on age (in years)and sex from the residents of a retirement home.
What percentage of residents are in the age group 60-69?
(Multiple Choice)
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Given the following "data scenario," decide which type of grouping (single-value, limit, or cutpoint) is probably the best.
-Number of Pets: The number of pets per family.
(Multiple Choice)
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A variable which can take any real-number value in the interval [ 0, 1 ] is a continuous variable.
(True/False)
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Construct the requested histogram.
-The table below shows the number of days off in a given year for 30 police detectives.
Days off Frequency 0-under 2 10 2-under 4 1 4-under 6 7 6-under 8 7 8-under 10 1 10-under 12 4 Construct a frequency histogram.
(Essay)
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Complete the contingency table and use it to solve the problem.
-The partially filled contingency table gives the relative frequencies of the data on age (in years)and sex from the residents of a retirement home.
What percentage of residents are males in the age group 60-79?
(Multiple Choice)
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Complete the contingency table and use it to solve the problem.
-The partially filled contingency table gives the frequencies of the data on age (in years)and sex from the residents of a retirement home.
What percentage of residents are males in the age group 60-69 ?
(Multiple Choice)
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The following table shows the average weight of offensive linemen for each given football team. Team Average weight (pounds) Gators 303.52 Lakers 326.78 Eagles 290.61 Pioneers 321.96 Lions 297.35 Mustangs 302.49 Rams 345.88 Buffalos 329.24 What kind of data is provided by the information in the second column?
(Multiple Choice)
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A large record company reported the following sales figures for various music media last year. Media Sales (\ millions) CD 1477.3 CD single 1.8 MP3 65.9 Vinyl 2.6 Music video 531.4 Mini Disc 0.3 DVD 108.2 Cassette 3.4 Identify the variable under consideration in the second column?
(Multiple Choice)
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A graphical display of a data set is given. State whether the distribution is (roughly)symmetric, right skewed, or leftskewed.
-Two dice were rolled and the sum of the two numbers was recorded. This procedure was repeated 400 times. The results are shown in the relative frequency histogram below.
(Multiple Choice)
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The data in the following table reflect the amount of time 40 students in a section of Statistics 101 spend on homework each day. Find the value of the missing entry.
Homework time (minutes) Relative frequency 0-14 0.05 15-29 0.10 30-44 0.25 45-59 60-74 0.15 75-89 0.05
(Multiple Choice)
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The following table gives the top five movies at the box office this week. Rank Last week Movie title Studio Box office sales (\ millions) 1 N/A Pirate Adventure Movie Giant 35.2 2 2 Secret Agent Files G.M.G. 19.5 3 1 Epic Super Hero Team 21st Century 14.3 4 5 Reptile Ride Movie Giant 10.1 5 4 Must Love Cats Dreamboat 9.9 Identify the variable under consideration in the second column?
(Multiple Choice)
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Provide the requested response.
-The table contains data from a study of daily study time for 40 students from Statistics 101. In constructing an ogive from the data, what quantity should be assigned to each axis. Minutes on homework Number of students Relative frequency Cumulative relative frequency 0 -under 15 2 0.05 0.05 15 -under 30 4 0.10 0.15 30 -under 45 8 0.20 0.35 45 -under 60 18 0.45 0.80 60 -under 75 4 0.10 0.90 75 -under 90 4 0.10 1.00
(Multiple Choice)
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Which type of graph, a stem-and-leaf diagram or a frequency histogram, would be more useful for the data set below? Explain your thinking. 2.3 3.2 5.1 6.3 7.3 7.7 8.1 8.9 9.3 9.5 10.2 11.1 12.7 14.7 15.6 16.4 18.6 19.1
(Essay)
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A graphical display of a data set is given. Identify the overall shape of the distribution as (roughly)bell-shaped,triangular, uniform, reverse J-shaped, J-shaped, right skewed, left skewed, bimodal, or multimodal.
-The ages of a group of patients being treated at one hospital for osteoporosis are summarized in the frequency histogram below.
(Multiple Choice)
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Construct a dotplot for the given data.
-A manufacturer records the number of errors each work station makes during the week. The data are as follows.
(Multiple Choice)
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