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1. I have computed an analysis of variance for three groups with 10 observations per group. The degrees of freedom for the F test are
A. 3 and 30.B. 2 and 10.C. 2 and 27.
2. I have computed an Analysis of Variance F test and obtained a p-value, p = 0.001. This means
A. all the groups have the same mean.B. all the group means are different.C. some of the group means differ from the others.
3. An ANOVA F test is an extension of a
A. two-sample t test.B. two-sample z test.C. two-sample test of proportions.
4. One reason we use the Bonferroni method for multiple comparisons is that
A. as we perform more comparisons, the family-wise rate increases.B. the individual comparisons are not independent.C. Neither choice is correct.
The sample mean of the number of spots on the 6000 rolls, should be about If this die is rolled 6000 times, the number of times we get a 2 or a 3 should be about
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
Find the standard error of the difference in sample means,
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Assume the researcher's rats can be considered an SRS from the population of all laboratory rats. The mean Math SAT score of these students is found to be 560, 80 points higher than the national average.
A simple random sample of 1000 Americans found that 61% were satisfied with the service provided by the dealer from which they bought their car.
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
We are interested in comparing the proportions of males and females who think earning a large salary is very important to them. I surveyed 200 of each gender and recorded their answers to the question as yes or no.
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