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A researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. A collection of 30 adult volunteers was randomly divided into three groups of 10 subjects each. Each group did a standard step-aerobics workout with group 1 at a low rate of stepping, group 2 at a medium rate of stepping, and group 3 at a high rate of stepping. The mean heart rate at the end of the workout for all subjects was determined in beats per minute. Assume the data for the three groups are independent and the data are approximately Normal. The means and standard deviations of the heart rates for the three groups are given below.
An ANOVA F test was run on the data with the following results.
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.10. The value of t ** is 2.2426. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
A. Group 3 has a higher mean heart rate than either group 1 or group 2. Group 1 and group 2 are indistinguishable.B. Group 3 has a higher mean heart rate than group 1. The other pairs of means are indistinguishable.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
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
What is the probability you pick a plum and Which of the following is a legitimate probability distribution for this situation
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
Using the Census data, the OH Registry of Motor Vehicles reveal the subsequent about the Autos owned by the 10 families residing in Smallville.
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
Answer the following three questions based on what you know about statistics now.
how many individuals will I need to sample if I want a 95% margin of error to be no more than 3%, I want to know if the results are significant at = 10%. With the information given.
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
A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
Suppose the probability of the worst-case scenario increases Compute the expected value of perfect information
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