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A test is conducted to compare three difference income tax software packages, to determine whether there is any difference in the average time it takes to prepare income tax returns using the three different software packages. Ten different people's income tax returns are done by each of the three software packages and the time is recorded for each. Which of the following is true?
1. The total degrees of freedom is 30.2. The between blocks degrees of freedom is 2.3. The between samples degrees of freedom is 2.4. The three software packages are the blocks.
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population proportions.
Did you find any outliers on the dependent variables that were due to errors of coding? If so, what and why? How would you correct an error of coding?
From past information, it is known that the standard deviation of the population is 22 mph. The 96.6% confidence interval for m is?
In a survey of 8000 woman, 5431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of woman who change their nail polish once a week. A 99% confidence interval for the population is??
Suppose you are waiting for your federal tax refund. On average, how many weeks would you have to wait before receiving your refund?
The unlikelihood of everyone who plays the lottery choosing a correct 6 would be very large indeed. Is this unethical advertising? Is it misleading? is the lottery in general, unethical? Why or why not?
If the sides of the square are lengthened by 5cm, the area becomes 144cm^2. Find the length of a side of the original square.
The Skateworld Company operates ice rinks in several major cities throughout the United States. During each session of open skating, one customer is selected at random to receive a free pass for a future open skating session.
If two registered voters are selected at random, what is the probability exactly one voter is a democrat?
Given the following data on hotel check-ins for a 6-month period:
Union Membership Nationwide 13.7% of employed wage and salary workers are union members (down from 20.1% in 1983). A random sample of 300 local wage and salary workers showed that 50 belonged to a union.
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