A student who is taking statistics for the second time (for the fun of it!) wants to compare the proportion of students who pass the course at his college using Analyzing Data and Making Decisions as their text, compared with last year, when a competitor text was used. The student believes the proportion of those who pass will be more than 10% higher than last year. What is the appropriate alternative hypothesis? (Use subscript “1” for last year, and “2” for this year.)
Answer to relevant QuestionsWhy is there no such thing as a left-tailed goodness-of-fit test? The Hendrick Software Sales Company has collected data on the number of contacts made by its sales staff, and the software sales, for a random sample of months. Create an appropriate scatter diagram for these data. What is ...The R2 for the data on sales and promotional spending for Smith and Klein Manufacturing is 0.83, which is a relatively high value. Does this mean that the least squares regression line is a good model in this case? The Top 25 global research organizations include companies such as The Nielsen Company, the Ipsos Group, and Harris Interactive. Data about global research revenues (in US$ millions) and the number of full-time employees ...a. If appropriate, construct a 95% confidence interval estimate for the average exam mark of students who had a mark of 65% on the second test of a statistics course (using the data set described in Exercise 11). b. If ...
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