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1. I plan an experiment to test the latest conflicting diet programs. The factor for Diet will involve three different levels: low fat, low carbohydrate, and low calorie. The other factor will involve planned exercise. One level will be coached aerobics and the other will be normal activity. We hope to find out which regime is best at reducing weight. The degrees of freedom for the model are
A. 6.B. 2.C. 5.
2. I plan an experiment to test the latest conflicting diet programs. The factor for Diet will involve three different levels: low fat, low carbohydrate, and low calorie. The other factor will involve planned exercise. One level will be coached aerobics and the other will be normal activity. We will have 25 subjects assigned to each treatment combination. We hope to find out which regime is best at reducing weight. The degrees of freedom for error are
A. 149.B. 144.C. 5.
3. An experiment tests the effects of new devices to help stop smoking. They tested hypnosis, nicotine gum, nicotine patch, and nicotine inhaler. They believed the effects may differ for men and women, so men and women were randomized to the treatments separately. 25 subjects are randomized into each treatment combination. They obtained the following results
The value of the F statistic for Devices isA. 31.62.B. 32.93.C. 23.71.
The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom
What is the probability the average of the sample is more than $38000 and What is the standard deviation of the sample mean
A teacher gave a 25 question multiple choice test. After scoring the tests, she computed a mean and standard deviation of the scores. The standard deviation was 0. Based on this information
What statistical procedure was used to analyze data in study B?
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
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.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
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