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A business owner considers the relationship between square footage and monthly sales.
Square footage, Sales (1,000s)
380 32
400 37
250 33
320 31
330 29
360 37
a. Determine the correlation coefficient.
b. Is there a strong relationship? If so determine the line of best fit.
c. Estimate what the sales should be for a 3000 square foot shop.
The height and diameter of 31 trees of a certain species were measured, the trees were cut down, and the volume of usable lumber was determined. Find the explanatory variable(s) in this study are
20 students in a class - if there is a 15% probability that a randomly chosen member has seen a particular movie - what is the expected number of students have seen the movie?
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that:
Can we conclude a difference in means? YES or NO (circle one)
Use given data to create the unbiased point estimate of 12σ'> 2 of percentage of termites that are minor workers.
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.
The following frequency table determine the ages of 100 shoppers at the local grocery store. Compute the sample mean for this data (mean for the grouped data).
According to a hospital administrator, historical records over the past 10 years have shown that 20 percent of major surgery patients are dissatisfied with after-surgery care in the hospital. A scientific poll based on 400 hospital patients has ju..
Find the alternative would be chosen according to expected value and utility.
Compute a 3 month moving average forecast of demand for April through January (of the next year). Compute a 5 month moving average forecast for June through January
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting:
Suppose that the cars have been categorized according to whether the car needs warranty-related repair (yes or no) and the country in which the company manufacturing the car is based
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