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The accompanying data represent the number of days? absent, x, and the final exam? score, y, for a sample of college students in a general education course at a large state university.
Number of absences, x Final exam score, y
0 89.8
1 86.1
2 83.4
3 80.3
4 79.1
5 73.5
6 63.9
7 70.9
8 65.2
9 66.5
Find the? least-squares regression line treating number of absences as the explanatory variable and the final exam score as the response variable.
In a large department, it was discovered that, out of 64 people who have disease X, 48 had eaten tuna casserole from the canteen.
1. Among coffee drinkers, men drink a mean of 2.5 cups per day with a standard deviation of 0.5 cups. Assume the number of drinking per day follows a normal distribution. a. What is the probability that a man drinks less than 3.5 cups per day?
Suppose a newspaper article states that drinking three or more cups of coffee per day doubles the risk of gall bladder cancer. Before giving up coffee, what questions should be asked by a person who drinks this much coffee?
Suppose the mean pulse rate of college students is 68 beats per minute with a standard deviation of 11.5.
Determine whether significant differences exist in the annual returns for the three industries at the 5% significance level.
In each drawing of Lotto 6/45, six distinct numbers are drawn from the numbers 1,..., 45. In an analysis of 30 such lotto drawings, it was apparent
If µ = µ1 = µ2 = µ3 = 60 and σ21 = σ22 = σ23 = 15, calculate the probability that the total time to finish the three repair tasks is at most 200 minutes.
Automated materials handling. Modern warehouses use computerized and automated guided vehicles for materials handling. Consequently, the physical layout.
suppose there are three bills in a wallet. one of thebills is a 1 one is a 5 and one is a 10 bill. you selecttwo bills
An inventor has developed a new, energy -efficient lawn mower engine. He claims that the engine will run continuously for 5 hours (300 minutes)
Lemington's is trying to determine how many Jean Hudson dresses to order for the spring season. Demand for the dresses is assumed to follow a normal.
In a factory items are produced on three production lines, A, B, and C. At the end of each line the items are packed into boxes of 20. These boxes are then stored in the warehouse. The boxes from each production line are stored in separate stacks...
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