Mathematics

Mathematics, 30.07.2019 17:00, deku6

If the test scores of a class of 36 students have a mean of 75.2 and the test scores of another class of 28 students have a mean of 67.4, then the mean of the combined group is

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Mathematics, 16.07.2019 03:20, ItzMeEmilyyyy

Ackerman and goldsmith (2011) found that students who studied text from printed hardcopy had better test scores than students who studied from text presented on a screen. in a related study, a professor noticed that several students in a large class had purchased the e-book version of the course textbook. for the final exam, the overall average for the entire class was μ = 81.7, but the n = 9 students who used e-book had a mean of m = 77.2 with a standard deviation of s = 5.7. on the basis of these data, can the professor conclude that students using e-books had significantly lower scores than the regular class? use α = .05 with a one-tailed test.

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Mathematics, 18.07.2019 11:00, amcdonald009

Ateacher is comparing her students’ math quiz scores in two of her classes. the line plots show the number of questions answered correctly for 20 randomly selected students from each class. which statement is best supported by the information in the plots? a.)students in class b are more likely to have higher scores than students in class a. b.)students in class a have the same scores as students in class b. c.)students in class b always have higher scores than students in class a. d.)students in class a are more likely to have higher scores than students in class b.

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Mathematics, 05.10.2019 16:30, PrincessIndia

Test scores. three statistics classes ail took the same test histograms of the scores for each class are shown delow, sol students 30 60 of students of shadente class 3 b) which dass had the highest median score? css 2 c) for which class are the mean and median most dif- ferent? which is higher? why? d) which dass had the smallest standard deviation? e) which class had the smallest iqr?

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Mathematics, 09.10.2019 21:40, Billyr9088

Cindy is a first-year math teacher who has just collected a chapter test from her 4th period students. as cindy reviews the test scores, she notices that while she has several students who have earned an a, most of the test scores are in the c to b range. she also notices that two of the scores are much lower than the rest, each earning an f. this makes sense to her, as those two students were absent for much of the chapter. however, she must now report to her principal on the performance of her class on this test. which measure of central tendency should cindy use in her report to the principle if she wants to portray her students in the most favorable manner?

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