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Fitting of simple linear regression equation.
Circulation is the lifeblood of the publishing business. The larger the sales of themagazine , the more it can charge advertisers. Recently, a circulation gap has apperared between the publishers reports of the magazines newsstand sales and subsequent audits by the Audit Bureau of circulations. The data in the file Circulation represents the reported and audited newsstand sales(in thousands) in 2001 for the following 10 magazines:
Magazines
reported(X)
Audited(Y)
YM
621.0
299.6
COS GIRL
359.7
207.7
ROSIE
530.0
325.0
PLAYBOY
492.1
336.3
ESQUIRE
70.5
48.6
TEEN PEOPLE
567.0
400.3
MORE
125.5
SPIN
50.6
39.1
VOGUE
353.3
268.6
ELLE
263.6
214.3
a) Construct a scatter plot.
b) Interpret the meaning of slope, b1, in this problem
c) Predict the mean audited newsstand sales for a magazine sales of 400,000
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the probability that.
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
Within distribution of scores, measures of dispersion give an indication of?
If the population mean was $1047 in the previous year, does the evidence suggest that expenditure this year has significantly changed?
At a large commercial bakery, one of the measures used to evaluate employees is number of broken cookies per 1000 produced. The quality control department wants to determine if there is a relationship between years of experience and the broken co..
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
For which of the following situations is it appropriate to use a scatter diagram or scatter plot?
If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
We are interested in determining if the accident proportions differ between the two age groups:
Estimate and interpret the p-value of the calculated test statistic.
Calculate separately for 1983 and 1987, the 95% confidence interval for the proportion of students who had driven an automobile while drinking.
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