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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?
Listed below are the highway fuel consumption amounts (in mi/gal) from cars in three different categories. Use a 0.05 signifiacance level to test the claim that the different car categories have the same median highway fuel consumption.
The statistical research was done primarily through the internet from governmental regulated sources. Estimates were used in consideration of absence of actual information.
Data is distribution of the most popular colors for 2005 model luxury cars made in North America. Design the pie chart and bar graph for data.
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
In rectangular coordinate system, determine the distance between the points (-4,1) and (8,6).
Developing a linear programming problem using Commuter Bus scheduling to minimize the total cost.
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable-one three digit number wins $600 and all others win nothing-that gamblers never reach "the long run".
We can compare two sample means to determine if the samples were obtained from normal populations with the same mean using the "t" distribution.
According to the study, the mean age of a self-employed individual is 46.6 years with a standard deviation of 10.8 years.
The combined production level should not exceed 1200 units per month. The demand for product II is no more than half the demand for product I.
We are interested in determining if the accident proportions differ between the two age groups:
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
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