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At a large assembly line, the manufacturer reassigns employees to dierent tasks each month. This keeps the workers from getting bored by endlessly repeating the same task. It also lets them see how the work done in different stages must fit together. It is known that 55% of the employees have less than or equal to two years of experience, 32% have between three and five years of experience, and the rest have more than five years of experience. Assume that teams of three employees are formed randomly. Dave works at this assembly line. Consider one of Dave's teammates. What is the probability that this teammate has two or fewer years of experience? more than five years of experience? What is the probability that, considering both of Dave's two teammates, both have more than two years of experience? exactly one of them has more than five years of experience? at least one has more than fi ve years of experience?
A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, and super grades of gasoline. They drive the same car under approximately similar driving conditions and changing out the type of gasoline used.
What is the level of measurement for these items related to the newspaper business?
A new process has been implemented and it is stated to have an average cycle time of 120 seconds. A sample of 50 cycles yielded an average cycle time of 115 seconds, with a standard deviation of 2 seconds.
Suppose that the proprietor of a shop determines that 60% of her customers use a credit card, 30% pay with cash, and the rest use a debit card. What is the probability that a customer does not pay with cash?
Can the president conclude that the average family income at his school is significantly different than the population mean family income of the reported university?
What was the critical F value chosen?
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
Calculate the population mean and population standard deviation.
There are 8 men and 4 women in the math club. Four members are selected at random to attend a math conference. Determine the probability of selecting 2 men and 2 women.
A manager wishes to find out whether there is a relationship between the number of radio ads aired per week and the amount of sales of a product. the data for the sample are shown below?
Take any number, square it, and add 6, multiply by the original number. Now add 5 to that. Now divide this by the original number plus 1. Now subtract your original number and you should get 5.
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
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