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1) A research study was conducted to examine the efficacy of studying in groups. Students were randomly assigned to one of three groups: a single person group (individual studying), a group that had two study partners, and a group that had three study partners. After four weeks of studying, the students were given an exam. The raw scores are below. The data are presented below.
Group 1
Group 2
Group 3
78
82
74
87
79
86
76
65
83
85
92
81
95
90
94
77
89
88
71
2) Mr. Rotondo is concerned about the level of knowledge possessed by various majors regarding United States history. Students from various majors in the three academic areas of the College were asked to complete a standardized U.S. history exam. The Academic area for students was also recorded. Data in terms of percent correct is recorded below for 30 students.
Natural Science
Social Science
Humanities
62
80
75
67
72
68
3) A genetics engineer was attempting to cross a tiger and a cheetah. She crossed 175 tigers and cheetahs. Based on prior research she expected that 25% of the animals would have a phenotypic outcome of stripes only: 25% would have 3 spots only: and 50% would have both stripes and spots. When the cross was performed and she counted the individual cubs she found 45 with stripes only, 41 with spots only and 64 with both.
question an employer wants to know what types of activities encourage her employees to exercise.nbsp the first month
1.which of the following would have a binomial distribution?a.a couple will have children until they have three girls
1. a fruit grower sprays 200 trees with a new spray and 200 other trees with a standard spray to protect against insect
In Dallas some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 143, 348 runs and had 20 accidents, while the fleet of yellow firetrucks made 135,035 runs and had 4..
The students were asked to evaluate the effectiveness of the format on an 11-point scale (1 = poor, 11 = excellent). What are the degrees of freedom associated with the test statistic?
The following table presents the total sample size and the percentage distribution of a grouped variable, "Hours of Shopping this Year." Calculate the mean and the variance
Calculate the per-phase electromotive force and the torque angle of a deltaconnected 50-kVA, 400-V synchronous generator, delivering its rated current to a load having 0.85 power factor (lagging). The perphase synchronous reactance and resistance ..
The mean sat verbal score is 401, with a standard deviation of 97. Use the empirical rule to determine what percent of the scores lie between 207 and 498.
Use the odds for each group to compute the relative odds of Group B to Group A. How does this number compare to the result in Question #7. Does this make sense?
Suppose you are trying to estimate the average miles per gallon for a new brand of car. You take a random sample of 40 cars, and, for this sample, the average miles per gallon is 32 and the standard deviation for this sample is 2.2. Answer the fol..
Suppose that this test is given to 1000 students. What is the number of students that are expected to make scores between 170 and 230?
Assuming that the data may be viewed as a random sample from a normal population, construct a 95% con?dence interval for the actual average diameter of bearings made by this process and interpret.
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