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Circulation is the lifeblood of the publishing business. The larger the sales of a magazine, the more it can charge advertisers.Recently,a circulation gap has appeared between publishers 'reports of magazines'newstands sales and subsequent audits by the Audit Bureau of Circulations. The data below represents the reported and audited newsstand sales in 2001 for the following 10 magazines:
Magazine Reported(X) Audited(Y)
YM 621 299.6
Cosmo Girl 359.7 207.7
Rosie 530 325
Playboy 492.1 336.3
Esquire 70.5 48.6
Teenpeople 567 400.3
More 125.5 91.2
Spain 50.6 39.1
Vogue 353.3 268.6
Elle 263.6 214.3
(a) Construct a scatter plot?
(b) Calculate the slope and intercept in this problem?
(c) Predict the mean audited newsstand sales for a magazine that reports newsstand sales of 400,000?
Find the expected value if the cost of entering this sweepstakes is the cost of a postage stamp. Is it worth entering the contest?
In your opinion, which one/s of these factors (independent variables) will have a negative correlation with bone density and which one/s will have a positive correlation?
Eagle Outfitters is a chain of stores specializing in outdoor apparel and camping gear. It is considering a promotion that involves mailing discount coupons to all its credit card customers.
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F. Is body temperature of 99.00 °F unusual? Why or why not?
The probability that a house in an urban area will be burglarized is 5%. If 50 houses are randomly selected, what is the probability that one of the houses will be burglarized?
A stationary store wants to estimate the mean retail value of greeting cards that it has in inventory A random sample of 100 greeting cards. a mean value of 2.55 and standard deviation of 0.44
A sample of 49 repairs showed an average overhaul of 285 hours with a standard deviation of 50 hours. Calculate a 95% confidence interval for the average overhaul.
The clinic estimates that the true population standard deviation is around $2,100. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy.
The city of Oakdale wishes to see if there is a linear relationship between the temperature and the amount of electricity used (in kilowatts).
Assuming 12=22, use a significance level of =.05 test to the null hypothesis H0: 1 - 2 = 0 against the alternative H1: 1 - 2 > 0. Does the test reject H0?
Tthe mean change score for the sample studied is an increase of 5.2. What is considered a medium effect size for a t test for dependent means?
Raising chickens in commercial chicken farms is a growing industry, as there is a shift from red meat to more white meat. New Jersey Red Chickens are a favorite chicken and the Feed is Us company has a new chicken food that they claim is excellent..
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