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Business, 05.07.2019 20:00, kragland4752

Ackerman and goldsmith (2011) compared learning performance for students who studied material printed on paper versus students who studied the same material presented on a computer screen. all students were then given a test on the material and the researchers recorded the number of correct answers. identify the dependent variable for this study. is the dependent variable discrete or continuous? what scale of measurement (nominal, ordinal, interval, or ratio) is used to measure the dependent variable?

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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, 01.09.2019 15:10, chegg16

Astudy uses a sample of 200 college students to learn about the number of hours they studied for their final exams. the mean number of hours was 136 and the standard deviation was 14 hours. if this data falls under a normal distribution or bell curve, which of the following statements is not true? the number of students that studied 122 or fewer hours was about 32. the number of students that studied 150 or fewer hours was about 168. the majority of students studied between 122 and 150 hours. no one studied less than 108 hours.

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Mathematics, 04.10.2019 21:00, boo3972

40 points a teacher surveyed her class after they had taken a vocabulary test. eighteen of the students claimed they had studied at least one hour for the test. the remaining twelve students admitted that they had not studied for the test at all. the test results (expressed as a percent) for the two groups are shown below. studied: 88, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 84 did not study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89 which of the following statements are true? the mean of the group that studied is over 15 percentage points higher than the mean of the group that did not study. there is no mode of the group that studied. the median of the group that did not study is less than 80. the median of the group that studied is over 95. in general, those students that studied scored much higher than those students that did not study.

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Mathematics, 16.10.2019 03:30, pettitchristy1

Ackerman and goldsmith (2011) report that students who study from a screen (phone, tablet, or computer) tended to have lower quiz scores than students who studied the same material from printed pages. to test this finding, a professor identifies a sample of n 5 16 students who used the electronic version of the course textbook and determines that this sample had an average score of m 5 72.5 on the final exam. during the previous three years, the final exam scores for the general population of students taking the course averaged m 5 77 with a standard deviation of s 5 8 and formed a roughly normal distribution. the professor would like to use the sample to determine whether students studying from an electronic screen had exam scores that are significantly different from those for the general population.

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