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The following are distances (in miles) traveled to the workplace by 6 employees of a certain university.
5, 20, 7, 14, 28, 28
Find the standard deviation of this sample of distances. Round your answer to two decimal places.
What is the null hypothesis in a chi-squared test of independence? How many 'tails' can a chi-squared test have, one or two? In a regression analysis, what do the residuals from the fitted line add up to?
At the end of the year, patients were diagnosed as healthy or relapsed, as summarized in the table:- Do these results provide evidence that Prozac might be helpful in treating anorexia? Explain.
The article also reported that "among GOP voters, 39 percent give Feinstein high marks." Would the margin of error accompanying this result be larger, smaller, or the same as the margin of error for the entire sample? Explain.
What would be the 95% confidence interval for the temperature of your cup of coffee?
Let = the sample mean of the 100 scores from University X, and = the sample mean of the 100 scores from University Y. What is the probability that will x be greater than y?
The sum of squares associated with the artist (factor B) is 2,230. The sum of squares for interactions is 804. The sum of squares for error is 8,262. Construct the ANOVA table, carry out the hypothesis tests, and state your conclusions.
The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of six syring
What is the probability that the coin tossed on the nth toss will fall heads if (i) n = 2, (ii) n = 4, (iii) n = 6, (iv) n is very large?
A mining company finds that daily lost-work injuries average 1.2. If the local union contract has a clause requiring that the mine be shut down as soon as three workers incur lost-work injuries, on what percentage of the days will the mine be ope..
Can you reject the owner's claim at alpha = 0.01? Check conditions before you perform the test. Use Minitab>stat>basic stat> 1-sample t to get the p-value and then use p-value approach.
let x denote the amount of time for which a book on 2-hour reserve at a college library is checked out by a student and
a department store is running a promotion one saturday by giving out coupons for 10 of free merchandise. based on the
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