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1. The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference in among the means?
Store A Store B Store C 30 42 30 14 28 14 22 20 20 18 35 16 26 49 15 25 28 3624
2. Choose a variable and collect data for at least three different groups (samples). Compare the means of the three groups using the one-way ANOVA technique. Complete the following:
1. Write a brief statement of purpose of the study 2. Define the population 3. State how the sample was selected 4. What a value did you use? 5. State the hypotheses 6. What was F test value? 7. State the decision 8. Summarize the results.
For a sample of 240 students selected at random, what is the mean and variance of the number of students who watch this game?
A research company has designed three different systems to clean up oil spills. The following table contains the results, measured by how much surface area (in square meters) is cleared in 1 hour. The data were found by testing each method in seve..
Evaluate the factor effects. Find out which factors are significant in explaining yield.
If the sum of squares regression is 1,000 and the sum of squares total is 5,000. Given that the sum of squares residual (or error) is 4,000 what is the r-squared value?
1.incomes in a certain town are strongly-right skewed with mean 36000 and standard deviation 7000. a random sample of
An insurance agent has appointments with four prospective clients tomorrow. From past experience the agent knows that the probability of making a sale on any appointment is 1 out of 5.
Figures for the yearly crime rate (the number of crimes per 1,000 population) in Mississippi, USA from 1993 to 2002 are as follows:
In an effort to counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the students in the class.
What type of test is described below and can you provide the null and alternate hypothesis? Using an old manufacturing process.
when a bus service reduces fares a particular trip from new york city to albany new york is very popular. a small bus
At that point, the mean becomes a random variable and the means of some of the different samples are 187, 192, 184, . . . 196. What can you say about the means of the sample with respect to the population mean?
Let A and B denote genetic characteristics and suppose that the probability is 1/3 that an individual chosen will exhibit
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