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The International Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups.
Assume that a sample of 38 people from a North Carolina city consumed a mean of 1.84 cups of coffee per day, with a standard deviation of 0.85 cups. In a two-tail test at the 0.05 level, could the residents of this city be said to be significantly different from their counterparts across the nation?
How many questions must the test contain in order to reduce the standard deviation of Julie's proportion of correct answers to one-fourth its value for an 100-item test?
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
a basketball team at a university is composed of ten players. the team is made up of players who playthe position of
A business invests $10,000.00 in a savings account for 2 years, At the beginning of the second year, an additional $3500.00 is invested, At the end of the second year, the account balance is $15,569.75. What is the annual interest rate?
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
For the Maine accident data modeled in Section 7.3.2: a. Verify that logistic model (7.9) follows from loglinear model (GLS, GI, LI, IS). b. Show that the conditional log odds ratio for the effect of S on I equals model
the global fisherypacks shrimps that weigh more than 1.91 ounces each in packages marked largeand the shrimp that
Explain why the polls that are so frequently quoted during early returns on Election Day TV coverage are an example of cluster sampling.
From the scenario, discuss two (2) areas of the United States economy that Ronald Reagan deregulated in the eighties. Explain at least two (2) methods the Reagan Administration used to deregulate these particular agencies or programs.
In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times. The bottom temperatures are recorded at the Garfield Bight station
Only 40% of these eruptions last longer than 2 minutes. For each of the following random variables, write down the distribution and the PMF. (Identify all parameters) What are the expectation and variance?
question global tv news in a segment on the price of gasoline reported that the mean price nationwide is 1.29 per
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