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It was hypothesized that the number of bottles of an imported premium beer sold in city restaurants depends linearly on the average cost of meals in these restaurants. The following results were obtained for a sample of n =20 restaurants of approximately equal size:
X Mean= 30, Y Mean= 18.8, Variance(X)=412, Cov(x,y)=212
where:
y = Number of bottles of imported premium beer sold, andx = Average cost, in dollars, of a meal.
A) Determine the sample regression line.
B) Interpret the slope of the sample regression line.
C) Is it possible to provide a meaningful interpretation of the intercept of the sample regression line? Explain.
Electrical connectors manufactured by a supply company last an average of 18.2 months and follow a normal distribution with a standard deviation of 1.7 months.
Archaeopteryx is an extinct beast having feathers like a bird but teeth and a long bony tail like a reptile. Five fossil specimens have preserved both the femur and humerus bones. The measurements (in centimeters) for each bone are given below.
P-value for test statistic is .085, determine the minimum level of significance needed to reject null hypothesis?
Determine a forecast for the average weekly sales in year 5 for each of the three seasons.
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?
Explain what these terms mean in describing the distribution of the sales reps' salaries.
From historical data, Harry's Car Wash estimates that dirty cars arrive at the rate of 10 per hour all day Saturday. With a crew working the wash line, Harry figures that cars can be cleaned at the rate of one every 5 minutes.
How much time should the employer allow employees to finish the job? (Round up to the nearest minute).
Is there a relationship between the opinion and the location of the resident at a level of significance of 0.05?
What is the p-value and compute a 95% CI for the difference in means between the two groups?
Using the 0.99 confidence coefficient, what are the confidence limits for the proportion that plan to vote for the Democratic incumbent.
One possible explanation for why some birds migrate and others maintain year round residency in a single location is intelligence.
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