Explanation Calculation: Given conclusion is that “mean time male students at university spend using a computer is greater than the mean time for female students”. For 46 males, the mean and standard deviation are 45.8, and 63.3 respectively. For 38 females, the mean and standard deviation are 39.4, and 57.3 respectively. The assumption for the two-sample t-test: The random samples should be collected independently. The sample sizes should be large. That is, each sample size is at least 30. The assumptions in this particular problem: Data are collected independently. The sample sizes are large enough. Here, there are 46 male and 38 female students are randomly selected for the study. Both sample sizes are greater than 30. Therefore, the assumptions are satisfied. Let μ 1 be the mean time spent using a computer, for males. Let μ 2 be the mean time spent using a computer, for females. Hypotheses: Null hypothesis: H 0 : μ 1 − μ 2 = 0 That is, the mean time spent using a computer is same for both males and females. Alternative hypothesis: H a : μ 1 − μ 2 > 0 That is, mean time spent using a computer differs for males and females. Test statistic and P-value: Software procedure: Step by step procedure to obtain the P -value and test statistic by using MINITAB software is as follows: Choose Stat > Basic Statistics > 2 sample t

Introduction to Statistics and Data Analysis

5th Edition

ISBN: 9781305445963

Author: PECK

Publisher: Cengage

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Question

Chapter 11.1, Problem 10E

To determine

Check whether there is convincing evidence that the mean time male students at university spend using a computer is greater than the mean time for female students or not .

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Chapter 11 Solutions

Introduction to Statistics and Data Analysis

Ch. 11.1 - Consider two populations for which 1 = 30, 1 = 2,...Ch. 11.1 - An individual can take either a scenic route to...Ch. 11.1 - Prob. 3E Ch. 11.1 - Prob. 4E Ch. 11.1 - The article Plugged In, but Tuned Out (USA TODAY,...Ch. 11.1 - Prob. 6E Ch. 11.1 - Prob. 7E Ch. 11.1 - The paper If Its Hard to Read, Its Hard to Do...Ch. 11.1 - Is injecting medical cement effective in reducing...Ch. 11.1 - Prob. 10E

Ch. 11.1 - Prob. 11E Ch. 11.1 - The paper Mood Food: Chocolate and Depressive...Ch. 11.1 - Prob. 13E Ch. 11.1 - Example 11.1 looked at a study comparing students...Ch. 11.1 - Prob. 15E Ch. 11.1 - Prob. 16E Ch. 11.1 - A newspaper story headline reads Gender Plays Part...Ch. 11.1 - Prob. 18E Ch. 11.1 - Fumonisins are environmental toxins produced by a...Ch. 11.1 - A researcher at the Medical College of Virginia...Ch. 11.1 - Do certain behaviors result in a severe drain on...Ch. 11.2 - Suppose that you were interested in investigating...Ch. 11.2 - Head movement evaluations are important because...Ch. 11.2 - To determine if chocolate milk was as effective as...Ch. 11.2 - The humorous paper Will Humans Swim Faster or...Ch. 11.2 - The study described in the paper Marketing Actions...Ch. 11.2 - Prob. 27E Ch. 11.2 - The paper Less Air Pollution Leads to Rapid...Ch. 11.2 - The paper The Truth About Lying in Online Dating...Ch. 11.2 - Prob. 30E Ch. 11.2 - Prob. 31E Ch. 11.2 - The paper Quantitative Assessment of Glenohumeral...Ch. 11.2 - Two proposed computer mouse designs were compared...Ch. 11.2 - Prob. 34E Ch. 11.2 - Prob. 35E Ch. 11.2 - The authors of the paper Ultrasound Techniques...Ch. 11.3 - Some people seem to believe that you can fix...Ch. 11.3 - Prob. 38E Ch. 11.3 - After the 2010 earthquake in Haiti, many...Ch. 11.3 - Prob. 40E Ch. 11.3 - The report Audience Insights: Communicating to...Ch. 11.3 - Prob. 42E Ch. 11.3 - Prob. 43E Ch. 11.3 - Prob. 44E Ch. 11.3 - The article Fish Oil Staves Off Schizophrenia (USA...Ch. 11.3 - The report Young People Living on the Edge...Ch. 11.3 - Prob. 47E Ch. 11.3 - Prob. 48E Ch. 11.3 - Prob. 49E Ch. 11.3 - Prob. 50E Ch. 11.3 - Prob. 51E Ch. 11.3 - The article Spray Flu Vaccine May Work Better Than...Ch. 11.3 - Prob. 53E Ch. 11.3 - The following quote is from the article Canadians...Ch. 11.3 - Prob. 55E Ch. 11.3 - Women diagnosed with breast cancer whose tumors...Ch. 11.3 - Prob. 57E Ch. 11.4 - The paper The Psychological Consequences of Money...Ch. 11.4 - An experiment to determine if an online...Ch. 11.4 - The paper Ready or Not? Criteria for Marriage...Ch. 11 - Prob. 61CR Ch. 11 - Prob. 62CR Ch. 11 - A deficiency of the trace element selenium in the...Ch. 11 - Prob. 64CR Ch. 11 - Prob. 65CR Ch. 11 - In a study of a proposed treatment for diabetes...Ch. 11 - When a surgeon repairs injuries, sutures (stitched...Ch. 11 - Prob. 68CR Ch. 11 - In a study of memory recall, eight students from a...Ch. 11 - As part of a study to determine the effects of...Ch. 11 - Prob. 71CR Ch. 11 - Prob. 72CR Ch. 11 - The article Truth and DARE: Tracking Drug...Ch. 11 - The article Softball Sliding Injuries (American...Ch. 11 - Prob. 75CR Ch. 11 - Wayne Gretzky was one of ice hockeys most prolific...Ch. 11 - Heres one to sink your teeth into: The authors of...Ch. 11 - Prob. 78CR Ch. 11 - Dentists make many people nervous. To see whether...Ch. 11 - Prob. 80CR Ch. 11 - Prob. 81CR Ch. 11 - Both surface soil and subsoil specimens were taken...

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Urban Travel Times Population of cities and driving times are related, as shown in the accompanying table, which shows the 1960 population N, in thousands, for several cities, together with the average time T, in minutes, sent by residents driving to work. City Population N Driving time T Los Angeles 6489 16.8 Pittsburgh 1804 12.6 Washington 1808 14.3 Hutchinson 38 6.1 Nashville 347 10.8 Tallahassee 48 7.3 An analysis of these data, along with data from 17 other cities in the United States and Canada, led to a power model of average driving time as a function of population. a Construct a power model of driving time in minutes as a function of population measured in thousands b Is average driving time in Pittsburgh more or less than would be expected from its population? c If you wish to move to a smaller city to reduce your average driving time to work by 25, how much smaller should the city be?

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