Tests and Quizzes for Statistics Quiz #1 Question 1 of 20 0.0/ 1.0 Points If a variable has possible values –2‚ 6‚ and 17‚ then this variable is A.a discrete variable B.a continuous variable C.neither a continuous nor a discrete variable D.both a continuous and a discrete variable Answer Key: A Question 2 of 20 1.0/ 1.0 Points Which of the following statistics is not a measure of central location? A.Median B.Mode C.Interquartile range D.Mean Answer Key: C Question
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Using the Normal Distribution The normal distribution is a very commonly occurring continuous probability distribution—a function that tells the probability that any real observation will fall between any two real limits or real numbers‚ as the curve approaches zero on either side. Normal distributions are extremely important in statistics and are often used in the natural and social sciences for real-valued random variables whose distributions are not known (Casella and Berger‚ 2002). This essay
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FINAL STEPS 1. Update your methodology section. 2. Once your data is in‚ close it in Qualtrics. 3. Export your data to SPSS and proceed to clean (see Workbook‚ SPSS I) • Check for skip pattern violations • Code verbatims • Categorize numbers (if needed) 4. Import data back to Qualtrics if changes were made. 5. Create cross-tabs in Qualtrics (see Workbook‚ SPSS I) • Demographics are banners‚ other questions are stubs • Click “Data Options.”
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ETF2121/ETF5912 Data Analysis in Business Unit Information – Semester 1 2014 Coordinator and Lecturer - Weeks 7-12: Associate Professor Ann Maharaj Office: H5.86 Phone: (990)32236 Email: ann.maharaj@monash.edu Lecturer - Weeks 1-6: Mr Bruce Stephens Office: H5.64 Phone: (990)32062 Email: bruce.stephens@monash.edu Unit material: No prescribed textbook Unit Book: available on the Moodle site. Exercises: available on the Moodle site. Software: EXCEL. Recommended Reference Books Berenson
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data points lie above 8. The mode rating is 9. We are 95% confident that the population rating of assistant teachers at Steele School who are chosen is between 7.091 and 8.623; however‚ since the distribution is not normally distributed‚ the confidence interval is not applicable. Group 2 The data is normally distributed. 21 parents are surveyed. The ratings range from 3 to 10. The average rating is 6.29‚ with a standard deviation of 1.648. Approximately half of the data points lie above 6. There mode
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off the internet as their own‚ copied answers off another student’s exam‚ or collaborated with other students on projects that were supposed to be completed individually) to summarize the data and comment on your findings. 2. Develop 95% confidence intervals for the proportion of all students‚ the proportion of male students‚ and the proportion of female students who were involved in some type of cheating. 3. Conduct a hypothesis test to determine if the proportion of business students at Bayview
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higher than the overall population when it comes to breaking the smoking habit. (b) Given the sample data‚ what is the proportion of college graduates who‚ having smoked at some point in their lives‚ were able to stop smoking? Construct a 95% confidence interval for the proportion. (c) What is the p-value? At = 0.01‚ what is your hypothesis testing conclusion? E2. The demand of a certain kind of pen in Fudan student supermarket last year obeys a distribution with an average 27 per day. This year the
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A Case Study in Creative Approaches to Customer Satisfaction Surveys Background The Washington Suburban Sanitary Commission (the Commission or WSSC) is a bi-county agency in Maryland established to provide water supply and wastewater treatment services for approximately 1.7 million people in Montgomery and Prince George’s Counties. WSSC has a service area of almost 1‚000 square miles‚ and serves about 430‚000 accounts. Ascellon’s work on this project was guided by three critical objectives that
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Sample 9.23 A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labeled as 8 ounces‚ the company wants the packages to contain a mean of 8.17 ounces so that virtually none of the packages contain less than 8 ounces. A sample of 50 packages is selected periodically‚ and the packaging process is stopped if there is evidence that the mean amount packaged is different from 8.17 ounces. Suppose that in a particular of 50 packages
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Due Date:15.7.2006 BIS 541 Homework-1 Q-1. The national Health Care Association is concerned about the shortage of nurses the health care profession is projecting for the future. To learn the current degree of job satisfaction among nurses‚ the association has sponsored a study of hospital nurses throughout the country. As part of this study‚ a sample of 50 nurses were asked to indicate their degree of satisfaction in their work‚ pay‚ and oppurtunities for promotion. Each of the three aspects
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