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The manager of a gas station and convenience store tabulates the following facts: 60% of customers purchase gasoline (G). 38% of customers purchase cigarettes (C). 74% of customers purchase gasoline or a drink (D). 18% of customers purchase gasoline and cigarettes. 21% of customers purchase a gasoline and a drink. 15% of customers purchase cigarettes and a drink. 3% of customers purchase all three items. (a) If we randomly select a customer, what is the probability that she purchases gasoline or cigarettes? _____ (b) If we randomly select a customer, what is the probability that she purchases a drink? _____ (c) What is , i.e., the probability that a randomly selected customer purchases cigarettes but not a drink? _____ (d) What is the probability that a randomly selected customer purchases exactly one of the three items? _____ (e) Which of the following statements is true? - G and C are independent. - G and D are independent. - C and D are independent. - None of the three pairs of events are independent.
If the coefficient of determination between two independent variables is 0.20, what is the VIF?
What is the preventive maintenance cost that makes the manager indifferent between a one week and a two week preventive maintenance strategy?
How many categories in the ACME transportation table are qualitative and what is the average number of merchandise per order, for all orders? Round to the nearest integer and what is the standard deviation of all orders in this sample?
The telephone bills send via regular mail
"Range of optimality" describes the impact of simultaneous changes in objective function values and right-hand-side values.
Regression analysis techniques
Build a regression model
Normal distribution on the population to estimate the value of the mean spending per day - estimate for the mean amount spent per day by a family of four visiting Niagara Falls.
Let X represent the number of tires with low air pressure on a randomly chosen car.
problem 1the average prices for a product in twelve stores in a city are shown
Create the indicator variables, the raw data does not include these - calculate a difference in the gscores between the consecutive rows; this is how we know if the Gleason score has increased since the last biopsy, which is one of the indicators f..
Which of the following is NOT a point estimate?
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