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Assume that the mean score on a normally distributed statistics quiz taken by 400 psychology students was 76, and the standard deviation was 8. Ben had a z-score of -1.2.
If someone gave a passing grade only to the top 25% of the class, what is the lowest score that would be considered passing?
What scores cutoff the middle 40% of grades?
What proportion of students scored outside of the area between scores 66 and 86?
If a bookworm starts at Page 1 of Volume I and eats its way through the volumes (following the shortest route) to the last page of volume IV, how many inches did the bookwor
SIT105 - Critical Thinking and Problem Solving - Demonstrate your understanding of some of the terms used in "Critical Thinking". The second goal is to undertake research wit
Construct a 95% confidence interval for the difference in proportions of women who deliver preterm - What proportion of children living in a US urban neighborhood is overweigh
How did you find or collect your data? (If you found the data, give a clear reference. If you collected the data, describe clearly the data collection process you used.)
At a used-book sale, 100 books are adult books and 160 are children’s books. Of the adult books, 70 are nonfictions while 60 of the children’s books are nonfiction. A book is
A high-school department made a change in its curriculum. What are the results of the test (do the data indicate that the new program results in a lowering of math skills). Sh
Set up a hypothesis test - State the null and alternative hypothesis and Confidence intervals of scores and the z or t intervals. Do a P test. Are the two tests consistent
A high-school department made a change in its curriculum. One of the instructors in the department suspected that the change would result in a lowering of math skills. Set u
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