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Question: Refer to the journal article given as Original Source 2 on the CD, "Development and initial validation of the Hangover Symptoms Scale: Prevalence and correlates of hangover symptoms in college students." On page 1447 it says: "The HSS [Hangover Symptoms Scale] was significantly positively associated with the frequency of drinking (r = 0.44)."
a. What two variables were measured for each person to provide this result?
b. Explain what is meant by r = .44.
c. What is meant by the word significantly as it is used in the quote?
d. The authors did not provide a regression equation relating the two variables. If a regression equation were to be found for the two variables in the quote, which one do you think would be the logical explanatory variable? Explain.
It has sold 120 more? $20 tickets than? $10 tickets. The total sales are ?66,600. How many tickets of each kind have been? sold?
Create a scatter plot of the variables Time (x) and Purchases (y). What relationship, if any, appears to exist between the two variables?
In relative frequency histogram for a large set of GPAs, the mean and the standard deviation are 2.10 and 0.21 respectively. What proportion of GPAs falls within 1.68 and 2.52?
Compute the expected frequencies for x 0, 1, 2, 3, and 4 by using the binomial probability function. Combine categories if necessary to satisfy the requirement that the expected frequency is five or more for all categories
Locate the most recent data from the Annual Survey of Hours & Incomes (ASHE) in either the Annual Abstract of Statistics or on the website at http://www.ons.gov.uk.
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
Merrill Lynch Securities and Health Care Retirement, Inc., are two large employers in downtown Toledo, Ohio. They are considering jointly offering child care for their employees.
Same survey showed that average length of time each store was in bbusiness is 6 years, with standard deviation of 25 years. Which is more variable, number of magazines or number of years.
You are interested in your employee's opinion of a training class. Specifically, you want to know if their experience level is a factor in how they perceive the value of the training. What are the null and alternate hypotheses?
Assume the random variable x is normally distributed with mean µ=86 and standard deviation s=5. Find the indicated probability.
you are head of risk management for the norne corporation. due to the size of your company you feel comfortable
according to thepoultrysite.com the weights of broilers are approximately normally distributed with a mean of 1387
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