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The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a standard deviation of 20¢. A study was done to test the claim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 95¢ with a standard deviation of 18¢.
Construct a 95% confidence interval for the true mean or proportion. Answer to one decimal place.
How many different combinations are possible if 6 substitute workers are available to fill 3 openings created by employees planning to take vacation leave next week?
Bill is completing a project for you in the marketing department. In conducting his anaysis regarding consumer behavior and a new product that has been released, he tells you the correlation between these two variables is 1.09.
Your first IBM SPPS assignment includes two sections in which you will: Create two histograms and provide interpretations
Feeding behavior of blackbream fish. In Brain and Behavior Evolution (April 2000), Zoologists conducted a study of the feeding behavior of blackbream fish.
(a) What is the probability that Bob wins? (b) Given that Bob won, what is the probability that the win did NOT occur on his second roll of the dice?
A researcher looks at the effect of 3 different drugs on 3 different groups of 10 people. Numbers refer to stress levels, with lower numbers being lower stress.
Arrows. An Olympic archer is able to hit the bull's-eye 80% of the time. Assume each shot is independent of the others.
A test of 45 capsules had a mean weight of 20.9 milligrams and a standard deviation of 0.3 milligrams. Test the makers claim at the 95% confidence level.
Describe two sets of circumstances, one when the loan would be the better choice and one when saving up would be the better choice.
Is there evidence that the scores of high-progress readers are higher than those of low-progress readers when they retell a story they have heard.
Find the mean, variance and standard deviation of the binomial distribution for a given variable. Round to the 10th place.
What would the new valude for calculated F? What rule relates changes in F ratio to changes in sample sizes?
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