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The means below are from a hypothetical study of the role of drive level and drugs on the learning performance of monkeys with four monkies in each group. . The animals are given a series of 20 "oddity" problems. In this task, three objects (two of the same, one different). Are presented to the monkeys, and the subjects task is to learn to select the non-duplicated or odd object. A food reward is placed in a food well underneath the correct object. A trial consists of the presentation of three objects and the monkey's selection of one of them. The response measure Y is the number of errors in 20 trials of training. One of the independent variables Factor A consists of a Control and two Drug conditions, and the other variable Factor B is the drive level of animals, either 1 hour of food deprivation of 24 hours of food deprivation. Four moneys are randomly assigned to each treatment combination. The results of the analysis of variance are presented below.
Source SS df MS F
Factor A(Drug) 112.00 2 56.00 3.06
Factor B (Motivation) 24.00 1 24.00 1.31
A x B 144.00 2 72.00 3.93*
MS (error) 330.00 18 18.33
In a 10-minute span of time, what is the probability that Indiana University scores exactly 20 baskets; at most 20 baskets?
A simple random sample is to be drawn from a population of 1200. To have 90% confidence that the sampling error in estimating p is no more than 0.03
After calculating the sample size needed to estimate a population proportion to within 0.04, your statistics professor told you the maximum allowable error must be reduced to just .01. If the original calculation led to a sample size of 800, the s..
In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule.
Find the probability that in a given month:
percentage of persons completing 4 years of college23 26 30 34 26 25 23 22 31 2224 38 33 27 27 34 24 24 24 2122 24 28
question a company needs to select an expert group of consultants to provide advice for a given project. how many
correlation concerns the relationship between the values of variables. regression analysis determines the nature of
An individual is considered to have the dominant characteristic if the person has the AA or Aa genetic trait. If we were to choose an individual from this city at random, what is the probability that this person has the dominant characteristic?
All students in a large enrollment multiple section course take common inclass exams and a common final, and submit common homework assignments.
All brawn? The figure below plots the average brain weight in grams versus average body weight in kilograms for 96 species of mammals.
Suppose verbal SAT scores for students admitted to a university are bell-shaped with a mean of 540 and a standard deviation of 50.
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