We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes): Sample 1 (bored): X⫽ 14.5, s2x⫽ 10.22, n ⫽ 28 Sample 2 (not bored): X⫽ 9.0, s2x⫽ 14.6, n ⫽ 34 (a) What are H0 and Ha?
- We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes): Sample 1 (bored): X⫽ 14.5, s2x⫽ 10.22, n ⫽ 28 Sample 2 (not bored): X⫽ 9.0, s2x⫽ 14.6, n ⫽ 34 (a) What are H0 and Ha? (b) Compute tobt. (c)With a ⫽ .05, what is tcrit? (d) What should we con-clude about this relationship? (e)Using our two approaches, how important is boredom in deter-mining how quickly time seems to pass?
- A researcher investigates whether classical music is more or less soothing to air-traffic controllers than modern music. She plays a classical selection for one group and a modern selection for another. She gives each person an irritability questionnaire and obtains the following: Classical: n ⫽ 6, X⫽ 14.69, s2x⫽ 8.4 Modern: n ⫽ 6, X⫽ 17.21, s2x⫽ 11.6 (a) Subtracting C ⫺ M what are H0 and Ha? (b)What is tobt? (c) With a ⫽ .05, are the results significant? (d) Report the results using the correct format. (e) What should she conclude about the relationship in nature between type of music and irritability? (f) What other statistics should be computed?
- For each of the following, which type of t-test is required? (a) Studying whether psychology or soci-ology majors are more prone to math errors on a statistics exam. (b) The study in part a, but for each psychology major, there is a sociology major with the same reading score. (c) A study of the spend-ing habits of a group of teenagers, comparing the amount of money each spends in an electronic games store and in a clothing store. (d) A study of the effects of a new anti-anxiety drug, measuring participants’ anxiety before and after administra-tion of the drug. (e) Testing whether women in the U.S. Army are more aggressive than women in the U.S. Marine Corps.
- You investigate whether the older or the younger male in pairs of brothers tends to be more extroverted. You obtain the following extrover-sion scores:Sample 1 (Younger) Sample 2 (Older)10 1811 1718 1912 1615 1513 1919 1315 20 (a) What are H0 and Ha? (b) Compute tobt. (c) With a ⫽ .05, what is tcrit? (d) What should you con-clude about this relationship? (e) Which of our approaches should we use to determine the effect size here?
- An experimenter investigated the effects of a sensitivity-training course on policemen’s effectiveness at resolving domestic disputes (using independent samples who had or had not completed the course). The dependent variable was the ability to resolve a domestic dispute. These success scores were obtained: No Course Course11 1314 1610 1412 17 81115 1412 1513 18 91211
Begin by reviewing the contents of the Course Resources Folder for each section . PowerPoint presentations will walk students through the theory and equations for each assignment. Also in this location, students should familiarize themselves with the Google Sheets XL Miner Instructions which will demonstrate the use of this spreadsheet file to perform many of the equations electronically. Problems noted with an asterisk must be completed using Google Sheets. The output table and graphs are then copied and pasted into the homework assignment document.
Problems will be found in your course textbook. For all problems, supply sufficient narrative to fully answer the question and justify your answer. Computer printouts by themselves are not sufficient to answer a question.
Students should upload a single word document file with all solutions labeled with the item and sub-item headings, interpreted and explained thoroughly in the narrative.
Also, please familiarize yourself with inserting symbols into your word documents using the following:
You can also find related documentations below:
How to insert mathematical symbols
Insert or Edit Equations
How to convert or save Word to PDF [VIDEO + TEXT]
Chapter
Page Number
Problems
Point Value
9
159-161
14, 16 & 24
8 points each
159-161 18* & 21* 8 points each
Total Point Value
