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The advertising manager of a chain of supermarkets would like to use shelf space to predict the sales of household cleaner. For a random sample of 12 similar stores,he gathered the following information regarding the shelf space, in feet, devoted to household cleaner and the weekly sales in hundreds of dollars.
Store 1 2 3 4 5 6
Shelf Space 5 5 5 10 10 10
Weekly Sales 1.6 2.2 1.4 1.9 2.4 2.6
Store 7 8 9 10 11 12
Shelf Space 15 15 15 20 20 20
Weekly Sales 2.3 2.7 2.8 2.6 2.9 3.1
Compute the value of the sample correlation coefficient between weekly sales and shelf space.
Is the correlation between weekly sales and shelf space significant at the .01 level of significance?
What is the estimated regression equation?
At the 0.10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
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The margin of error for a 95% confidence interval estimate for the proportion of all students with cell phones is
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Mean and standard deviation are 584.6 and 34.28
Compute the following linear programming problem and describe the special case of a linear programming problem in which.
Find the probability that the student 's test score is more than 39.8. Find the probability that the student's test score is between 33.5 and 41.9.
Suppose that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more?
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
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