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Hours of Television Viewing
Data on the text's website show the number of hours per week of television viewing for random samples of fifth grade boys and fifth grade girls.
Each student logged his or her hours for one Monday-through-Friday period.
Assume that the students were independent; for example, there were no pairs of siblings who watched the same shows.
Using graphical and numerical summaries, write a brief description of how the hours differed for the boys and girls.
Then carry out a hypothesis test to determine whether the mean hours of television viewing are different for boys and girls.
Evaluate whether the conditions for a t-test are met, and state any assumptions you must make in order to carry out a t-test.
When we take the sample of 100 of these average is $500 and SD is $100. (a) Determine statement to make about range $300 to $700?
The power generated by a solar electric generator is normally distributed with mean 15.6 kilowatts and standard deviation of 4.1 kilowatts. We may be 95% sure that the generator will deliver at least how many kilowatts?
in a recent survey concerning company sales and net earnings. 15 companies responded with the following
Queen Elizabeth II is famously the longest reigning monarch of the UK, followed by Queen Victoria - but who is third?
the number of calories and the milligrams of cholesterol for a random sample of fast-food chicken sandwiches from seven
Google is noted for its generous employee benefits. The following data reflect the number of vacation days that a sample of employees at Google.
Go to the Market Data section and then to Rates & Bonds and notice the listing of countries for which yields of different foreign currencies are shown. Review the 3-month yields of currencies.
Assume the data are normally distributed and normalize the sample mean. What is the probability that a sample mean would fall below 24 days based on this normalized statistic t where the actual standard deviation is unknown and the sample estimate..
For each of the F statistics given above find the degrees of freedom and an approximate P-value. Summarize the results of these tests.
The New York Times recently reported that 60% of college entrants into elite public and private colleges in the U.S. have parents that earn over $150,000/yr.
Five-card stud is a poker game, in which a player is dealt 5 cards from an ordinary deck of 52 playing cards. How many distinct poker hands could be dealt?
Determine the best investment, using the following decision criteria. a. Maximax b. Maximin c. Minimax regret
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