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Eating disorder study. Data from a psychology experiment were reported and analyzed in American Statistician (May 2001). Two samples of female students participated in the experiment. One sample consisted of 11 students known to suffer from the eating disorder bulimia; the other sample consisted of 14 students with normal eating habits. Each student completed a questionnaire from which a ‘‘fear of negative evaluation'' (FNE) score was produced. (The higher the score, the greater the fear of negative evaluation.) The data are displayed in the table at the bottom of the page.
(a) Construct a stem-and-leaf display for the FNE scores of all 25 female students.
(b) Highlight the bulimic students on the graph, part a. Does it appear that bulimics tend to have a greater fear of negative evaluation? Explain.
(c) Why is it important to attach a measure of reliability to the inference made in part b?
a real estate investor is investigating whether the proportion of properties sold at auctions has declined from last
A real estate agent records the ages of 50 randomly selected home buyers in her sales area. The mean age is 38 years, with a sample standard deviation of 8 years. Find a 99% confidence interval for the population mean age
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
for the single-sample t test the confidence interval is centered around theselect onea. population mean.b. standard
1. Assume that 328 people worked at the NJ facility in 2014 (NAICS Code 3359). Assume there were 24 recordable injuries listed on the OSHA 300 log with 3 injuries recorded as lost time injuries.
What is the difference between observational and experimental studies? Why do we conduct experimental studies? What is the purpose of observational studies?
Of all 3 to 5 year old children, 56% are enrolled in school. A sample of 500 children age 3 to 5 year old is ramndom selected. Find the probability that at least 250 children are enrolled in school.
Find the probability that exactly six tickets are written on a randomly selected day from this distribution.
Survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
Discuss the concept of statistical significance, including your understanding of what it means, why it is important, and how it can be used.
a small business just leased a new computer and color laser printer for three years. the service contract for the
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