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Suppose the coffee industry claimed that the average U.S. adult drinks 1.7 cups of coffee per day. To test this claim, a random sample of 34 adults was selected, and their average coffee consumption was found to be 1.95 cups per day. Assume the standard deviation of daily coffee consumption per day is 0.5 cups. Using a = 0.10, answer the following questions:
a) Is the coffee industry's claim supported by this sample?
b) Determine the p-value for this test.
c) Identify and interpret the critical sample mean or means for this problem.
d) Verify your results using PHStat2.
Find a 90% confidence interval for the population mean of annual growth (of those trees with an initial size of 2.41-2.60 centimeters).
Acme Taxi has two taxi cabs. The manager tracks the daily revenue for each cab. Over the past 20 days, Cab A has averaged $76.00 per night with a standard deviation equal to $11.00.
All three wines are produced in the optimal solution. How little would the profit for Blanc have to be for it to no longer be produced?
Computing the probability values using normal distribution - what proportion have SAT scores greater than 550?
A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12.
Of 1338 people who came into a blood bank to give blood, 253 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.
At a particular location on a river the number of fish caught per man-hour of fishing effort has a Poisson distribution with ?= 1.3 fish per man hour. Find the following probabilities:
1. correlation concerns the relationship between the values of variables. regression analysis determines the nature of
question the average 1-ounce chocolate chip cookie contains 110 calories. a random sample of 15 different brands of
Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees and a standard deviation of 1 degrees C.
Your boss tells you the margin of error is too large and wants it reduced to 3%. How many additional adults would you need in your sample to reduce the error to 3%?
i have two ordinary decks of cards 4 suits 13 denominations the usual the two decks have different back designs so i
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