Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 1, Problem 13P
For the f1onwing four exercises, determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience).
A market researcher polls every tenth person who walks into a store.
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Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include:
Mileage (mpg)
Number of Cylinders (cyl)
Displacement (disp)
Horsepower (hp)
Research: Google to understand these variables.
Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp
Mean
Median
First Quartile (Q1)
Second Quartile (Q2)
Third Quartile (Q3)
Fourth Quartile (Q4)
10th Percentile
70th Percentile
Skewness
Kurtosis
Document Your Results:
In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command”
In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…
Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include:
Mileage (mpg)
Number of Cylinders (cyl)
Displacement (disp)
Horsepower (hp)
Research: Google to understand these variables.
Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp
Mean
Median
First Quartile (Q1)
Second Quartile (Q2)
Third Quartile (Q3)
Fourth Quartile (Q4)
10th Percentile
70th Percentile
Skewness
Kurtosis
Document Your Results:
In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command”
In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…
Chapter 1 Solutions
Introductory Statistics
Ch. 1 - Determine what the key terms refer to in the...Ch. 1 - The data are the number of machines in a gym. You...Ch. 1 - The data are the areas of Lawns in square feet....Ch. 1 - The data are the colors of houses. You sample five...Ch. 1 - Determine the correct data type (quantitative or...Ch. 1 - The registrar at State University keeps records of...Ch. 1 - You are going to use the random number generator...Ch. 1 - Determine the type of sampling used (simple...Ch. 1 - A local radio station has a fan base of 20,000...Ch. 1 - Table 1.13 shows the amount, in inches, of annual...
Ch. 1 - From Table 1.13, find the percentage of rainfall...Ch. 1 - From Table 1.13, find the number of towns that...Ch. 1 - Table 1.13 represents the amount, in inches, of...Ch. 1 - Table 1.16 contains the total number of fatal...Ch. 1 - You are concerned about the effects of texting on...Ch. 1 - Describe the unethical behavior, if any, in each...Ch. 1 - Determine that the key terms refer to in the...Ch. 1 - Determine that the key terms refer to in the...Ch. 1 - Determine that the key terms refer to in the...Ch. 1 - Determine that the key terms refer to in the...Ch. 1 - Determine that the key terms refer to in the...Ch. 1 - “Number of times per week” Is what type of data?...Ch. 1 - The sampling method was a. simple random; b....Ch. 1 - “Duration (amount of time)” is what type of data?...Ch. 1 - The colors of the houses around the park are what...Ch. 1 - The population is ________Ch. 1 - Table 1.26 contains the total number of deaths...Ch. 1 - For the f1onwing four exercises, determine the...Ch. 1 - For the f1onwing four exercises, determine the...Ch. 1 - For the f1onwing four exercises, determine the...Ch. 1 - For the f1onwing four exercises, determine the...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Use the following data to answer the next five...Ch. 1 - Is a sample size of 1,000 a reliable measure for a...Ch. 1 - Is a sample of 500 volunteers a reliable measure...Ch. 1 - A question on a survey reads: “Do you prefer the...Ch. 1 - Is a sample size of two representative of a...Ch. 1 - Is it possible for two experiments to be well run...Ch. 1 - What type of measure scale is being used? Nominal,...Ch. 1 - Design an experiment. Identify the explanatory and...Ch. 1 - Discuss potential violations of the rule requiring...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - For each of the following eight exercises,...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - For the following exercises, identify (he type of...Ch. 1 - Use the following information to answer the next...Ch. 1 - Use the following information to answer the next...Ch. 1 - Airline companies are interested in the...Ch. 1 - Suppose you want to determine the mean number of...Ch. 1 - Suppose you want to determine the mean number of...Ch. 1 - List some practical difficulties involved in...Ch. 1 - List some practical difficulties involved in...Ch. 1 - With your classmates, brainstorm some ways you...Ch. 1 - The instructor takes her sample by gathering data...Ch. 1 - A study was done to determine the age, number of...Ch. 1 - Name the sampling method used in each of the...Ch. 1 - A “random survey” was conducted of 3,2’4 people of...Ch. 1 - The Well-Being Index is a survey that follows...Ch. 1 - In advance of the 1936 Presidential Election, a...Ch. 1 - Crime-related and demographic statistics for 4 US...Ch. 1 - YouPolls is a website that allows anyone to create...Ch. 1 - A scholarly article about response rates begins...Ch. 1 - Fifty part-time students were asked how many...Ch. 1 - Sixty adults with gum disease were asked the...Ch. 1 - Nineteen immigrants to the U.S were asked how many...Ch. 1 - How much time does it take to navel to work? Table...Ch. 1 - Forbes magazine published data on the best small...Ch. 1 - Use (he following information o answer the next...Ch. 1 - Use (he following information o answer the next...Ch. 1 - How does sleep deprivation affect your ability to...Ch. 1 - An advertisement for Acme Investments displays the...Ch. 1 - The graph in Figure 1.15 shows the number of...Ch. 1 - Seven hundred and Seventy-one distance learning...Ch. 1 - Several online textbook retailers advertise that...
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- Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include: Mileage (mpg) Number of Cylinders (cyl) Displacement (disp) Horsepower (hp) Research: Google to understand these variables. Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp Mean Median First Quartile (Q1) Second Quartile (Q2) Third Quartile (Q3) Fourth Quartile (Q4) 10th Percentile 70th Percentile Skewness Kurtosis Document Your Results: In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command” In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…arrow_forward2 (VaR and ES) Suppose X1 are independent. Prove that ~ Unif[-0.5, 0.5] and X2 VaRa (X1X2) < VaRa(X1) + VaRa (X2). ~ Unif[-0.5, 0.5]arrow_forward8 (Correlation and Diversification) Assume we have two stocks, A and B, show that a particular combination of the two stocks produce a risk-free portfolio when the correlation between the return of A and B is -1.arrow_forward
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