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1. 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. An ANOVA was run on this data with the partial ANOVA table given below.
The sum of squares (SSG) for groups is
A. 5591.688.B. 3727.792.C. 1863.896.
2. A researcher is studying treatments for agorophobia with panic disorder. The treatments are to be the drug Imipramine at the doses 1.5 mg per kg of body weight and 2.5 mg per kg of body weight. There will also be a control group given a placebo. Thirty patients were randomly divided into three groups of 10 each. One group was assigned to the control, and the other two groups were assigned to each of the two treatments. After 24 weeks of treatment, each of the subject's symptoms were evaluated through a battery of psychological tests, where high scores indicate a lessening of symptoms. Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
A. there is strong evidence that the mean test score is higher for both treatment groups than the control.B. there is strong evidence that the mean test score is higher for at least one of the two treatment groups than the control.C. there is strong evidence that the mean test score is not the same for all three groups.
where the deviations εi are assumed to be independent and Normally distributed with mean 0 and standard deviation σ. This model was fit to the data using the method of least squares. The following results were obtained from statistical software.
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
What is the city mileage standard deviation for this SUV model?
Write introduction to STATISTICAL PROCESS CONTROL and Explain the use of SPC tools used at D2D
A sample of 160 workers in the downtown area classified each worker by race. A bar graph of the results is given below, but the bar for black workers in the graph below has been omitted.
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.
What is the probability that the mean contents of a six-pack are less than 12 ounces and what is the chance I find at most two defectives in the sample
The standard deviation of the time to complete the entire homework assignment
the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
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