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Campus survey. A researcher conducts a survey to learn about the sexual behavior of college students on a particular campus. A list of the undergraduates at the university is used to select participants. The investigator sends out 500 surveys but only 136 are returned.
a. Consider how the low response rate could bias the results of this study.
b. Speculate on potential limitations in the quality of information the researcher will receive on questionnaires that are returned.
Take the following data and create scatter plot using. ( use Excel On the top tab bar Find Insert Then find Charts And find Scatter you have to put the data.
Determine the proportion of CFO salaries that are less than $205,000 and at least $135,000.
Order pizza with this new crust again. Calculate a 98% confidence interval for the proportion of customers who would order the new thin crust pizza again.
As a bonus, students are encouraged to research new and interesting articles/ websites/ interactive tools, etc. which are pertinent to the class material.
Question 1: At the PISA Web site (www.pisa.oecd.org), there are summary statistics for math scores of 15-year-old males and females for various countries separately. The mean math scores for males, the mean math scores for females, and also the di..
An accounting firm has recently recruited six graduates: three men and three women. Three of the graduates are to be selected at random to work in the firms suburban office. Construct a probability tree.
In each case, briefly discuss whether you think the available sample data can be used to make an inference about the larger population.
In the general population, one woman in ten will develop breast cancer. Research has shown that 1 woman in 600 carries a mutation of the BRCA gene. Seven out of 10 women with this mutation develop breast cancer.
Further, 20 students get both questions 1 and 2 incorrect, 15 get both questions 2 and 3 incorrect, and 8 get both questions 1 and 3 incorrect, and 7 get all three questions incorrect. Find the probability that a randomly selected student: a) Gets..
What is the probability that one of the respondents, selected at random, accepted the offer?
What are the mean and the standard deviation of the number of firms that purchase a Unix machine from Sun Microsystems?
Suppose that the molecules in the atmosphere now are the same as those in the atmosphere when Caesar was alive, and that in the 2000 years or so since Caesar.
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