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Safety researchers, interested in determining whether the occupancy of a vehicle might be related to the speed at which the vehicle is driven.
Identify the null and alternative hypotheses, then use the 0.025 level of significance in reaching a conclusion regarding the null hypothesis.
A large investment firm claims that no discrepancy exists between the average incomes of its male and female investment counselors.
A researcher has used a standard test in measuring the job-satisfaction scores for employees randomly selected from three departments of a large firm.
Students in a large section of a biology class have been randomly assigned to one of two graduate students for the laboratory portion of the class.
How does the randomized block design differ from the one-way, completely randomized design?
Why is this not appropriate for the treatments being examined in the randomized block design?
What null and alternative hypotheses would be appropriate for the one-way ANOVA to examine the data?
In terms of the assumptions required for using ANOVA, what is the special relevance of the value calculated for the error mean square, MSE?
Explain the meaning of each term in the equation, then use the appropriate terms from the equation in presenting.
Twenty accounting students are randomly assigned to two different sections of an intermediate accounting class.
On snow-covered roads, winter tires enable a car to stop in a shorter distance than if summer tires were installed.
In using ANOVA to compare the means of several samples, what value would be expected for the calculated F-statistic.
In a one-way ANOVA, there are two independent samples, with n1 = 20 and n2 = 15. The calculated Fstatistic is F = 3.60.
A one-way ANOVA has been conducted for an experiment in which there are three treatments and each treatment group consists of 10 persons.
A university president collects data showing the number of absences over the past academic year for a random sample of 6 professors.
Explain the basic role that between-sample variation and within-sample variation play in carrying out an analysis of variance.
An anthropologist studying personal advertisements in a Utica, New York, newspaper has observed whether the advertiser included a mention.
The data in file XR11100 are the weights (in grams) for random samples of grain packages filled by two different filling machines.
A company that makes an athletic shoe designed for basketball has stated in its advertisements that the shoe increases the jumping ability.
A supermarket manager is examining whether a new plastic bagging configuration in the produce area might make it more efficient.
The developer of a new welding rod claims that spot welds using his product will have greater strength than conventional welds.