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a. If 120 subjects are divided equally among three groups, what are the dfs that you need to find the critical F, and what is the critical F for a .05 test?
b. What is the critical F for a .01 test?
c. If 120 subjects are divided equally among six groups, what are the dfs that you need to find the critical f, and what is the critical f for a .05 test?
d. What is the critical f for a .01 tets?
e. Compare the critical fs in part a and c and do the same for parts b and d. What is the effect on critical f of adding groups, if the total number of subjects remains the same?
What ethical issues are raised in the following: (a) Prisoners volunteer in anticipation of more favourable treatment.
The number of credits being taken by a sample of 12? full-time college students are listed below. Find the? mean, median, and mode of the? data, if possible.
Over the same period the average /maximum temperature in Dublin was 6.2 degrees Centigrade. The standard deviation was 2.9. How to compute the variance of temperature in Boston.
Use a 0.05 significance level to test the null hypothesis that the different weight categories have the same mean. Do the data suggest that larger cars are safer?
Describe how you would develop a random sample from among students.
Suppose you want to know how students at your school feel about the computer services that are offered. You are able to obtain the list of e-mail addresses.
Calculate the p-value for this test of hypothesis. Based on this p-value, will the quality control inspector decide to stop the machine and adjust.
suppose the sample size from the normal population is 11. also assume that the population standard deviation is
If two events are collectively exhaustive, what is the probability that both occur at the same time?
When we construct or design a test of hypotheses, we define a null hypothesis and alternative hypothesis. Describe a real-world situation that might be aided.
Draw a boxplot of the TimeToNext variable. What important feature of the data cannot be seen in the boxplot that is seen in the histogram?
the length of country and western songs is normally distributed and has a mean of 170 seconds and a standard deviation
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