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Question: Twenty volunteers aged 40 to 65 years old will participate in an experiment to compare two methods of memorizing information. The age variation in the participants concerns the researchers because memorization skills decrease with age.
a. Describe how the study could be done using a matched pair design.
b. Explain why a matched-pair design is a good idea in this situation.
determine the probability that at least 2 people in a room of 11 people share the same birthday ignoring leap years and
for a poll 43 of 21944 people polled answered yes to the given question. given that 43 is the best estimate of the
1. a study of commuting times reports the travel times to work of a random sample of 17 employed adults in new york
consumer reports provided extensive testing and ratings for more than 100 hdtvs. an overall score based primarily on
A psychologist wants to know whether the trimmed mean for children with divorced parents differs from 4.8. Suppose X‾t = 5.1 with sw = 7 based on n = 25. Test the hypothesis that the population trimmed mean is exactly 4.8 with α = .01.
a medical researcher wants to determine if a two month jogging program will reduce the resting pulse rate of women aged
Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
Consider a charity organizations that receives random donations. Assume the donations to arrive following a Poisson process with a rate of one donation per hour in average. What is the probability that it will not be able to make the payment?
If only 1.1% of the bus drivers have a weekly income of more than $429.35, what is the value of the standard deviation of the weekly earnings of the bus drivers?
Suppose that you wished to conduct a similar survey for the geographic region you live in. Describe the population for your survey.
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
in the movie casablanca rick played by humpy bogart helped a married couple by allowing the husband to win at the
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