Exam 25: Exploring and Collecting Data

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Use the following to answer the question(s) below. Suppose that in 2010 data were collected on the percent of people in Canada who had no employer pension plan. Summary statistics and a histogram for these data are shown below. -What is the most appropriate measure to describe the centre of these data?

(Multiple Choice)

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Question 21

Use the following to answer the question(s) below. Suppose that in 2010 data were collected on the percent of people in Canada who had no employer pension plan. Summary statistics and a histogram for these data are shown below. -The IQR for these data is

(Multiple Choice)

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Question 22

A researcher is conducting a study on Internet use. He decides to first categorize the population by education level (high school, college graduate, advanced degree, etc.) and then survey a select number from each category. This sampling strategy is called

(Multiple Choice)

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Question 23

A researcher is conducting a study on eating disorders. Using a list of recent participants in the online Weight Watchers program, she randomly selects a name from the alphabetized list. She then chooses every tenth person from that point on to include in her study. This sampling strategy is called

(Multiple Choice)

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Question 24

An office supply chain has stores in two locations, Toronto and Vancouver. One of these stores is to be closed within the coming year, and to help make the decision, management reviews sales data. Below are boxplots for monthly unit sales for both locations. Which of the following statements is not correct?

(Multiple Choice)

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Question 25

In listing a property, real estate agencies provides information on a number of variables. Which of the following variables related to property listings is categorical?

(Multiple Choice)

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Question 26

Use the following to answer the question(s) below. A recent survey of online shoppers asked them to indicate the primary reason they shop via the Internet. The table summarizes responses by reason and gender. -What percent of respondents who cited Greater Selection as the primary reason they shop online were females?

(Multiple Choice)

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Question 27

Which is true of the data shown in the histogram? I. The distribution is approximately symmetric. II. The mean and median are approximately equal. III. The median and IQR to summarize these data summarize the data better than the mean and standard deviation.

(Multiple Choice)

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Question 28

Showing 21 - 28 of 28

Use the following to answer the question(s) below. Suppose that in 2010 data were collected on the percent of people in Canada who had no employer pension plan. Summary statistics and a histogram for these data are shown below. -The IQR for these data is

A researcher is conducting a study on Internet use. He decides to first categorize the population by education level (high school, college graduate, advanced degree, etc.) and then survey a select number from each category. This sampling strategy is called

A researcher is conducting a study on eating disorders. Using a list of recent participants in the online Weight Watchers program, she randomly selects a name from the alphabetized list. She then chooses every tenth person from that point on to include in her study. This sampling strategy is called

In listing a property, real estate agencies provides information on a number of variables. Which of the following variables related to property listings is categorical?

Which is true of the data shown in the histogram? I. The distribution is approximately symmetric. II. The mean and median are approximately equal. III. The median and IQR to summarize these data summarize the data better than the mean and standard deviation.

Data

Surveys and Sampling

Displaying and Describing Categorical Data

Displaying and Describing Quantitative Data

Scatterplots, Association, and Correlation

Introduction to Linear Regression

Randomness and Probability

Random Variables and Probability Distributions

Sampling Distributions

Confidence Intervals for Proportions

Testing Hypotheses About Proportions

Confidence Intervals and Hypothesis Tests for Means

Comparing Two Means

Design of Experiments and Analysis of Variance Anova

Inference for Counts: Chi-Square Tests

Nonparametric Methods

Inference for Regression

Understanding Regression Residuals

Multiple Regression

Building Multiple Regression Models

Time Series Analysis

Decision Making and Risk

Quality Control

Understanding Probability Distributions and Statistical Inference

Exploring Relationships Among Variables

Using Statistics for Decision Making

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