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1. A researcher is interested in comparing SAT scores for students enrolled in public schools, private schools, and those home schooled. She selects a random sample of 20 high school students from each group and administers the SAT exam to them. She is interested in testing the null hypothesis that the mean SAT score is the same for each type of schooling using the one-way ANOVA. Some summary statistics for the three groups are given below.
An ANOVA F test was run on the data with the following results.
One-way analysis of variance
Analysis of variance
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
A. Home school has a higher mean SAT than either public or private schools. Public and private schools are indistinguishable.B. Home schooling is the best, followed by private schooling and then public schools. All differences are significant.C. No differences between the mean SAT scores of the three types of schools are found at = 0.05.
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
Drug sniffing dogs must be 95% accurate. A new dog is being tested and is right in 46 of 50 trials. Find a 95% confidence interval for the proportion of times the dog will be correct.
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test
A sample of 50 male and 50 female infants were put on an experimental infant formula. After two weeks the parents of each infant were asked to fill out a questionnaire concerning infant satisfaction on the formula. One of the questions was "Did Ba..
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.
Based on the equation of the least-squares line, we use software to predict the average number of home runs hit per game per team for the year 2001. We obtain the following.
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