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1. A machine produces 12,000 bolts per day, with a 3% defect rate. What is the probability that twelve defective bolts will be found in a sample of 600 bolts?
2. One bag contains 4 white balls and 2 black balls. A second bag contains 3 white balls and 5 black balls. One of the two bags is chosen at random, and a ball selected randomly. The ball is white. What is the chance the bag selected was the first bag?
What is the difference between common cause variation and special cause variation?
a survey is to be made of the prevalence of the common disease in a large population. for any disease that affects
Under new grading scale, how many students will have A's, B's, C's, D's and F's? Do you beleive the instructor must grade on a curve? Explain why or why not?
A new company is manufacturing light bulbs. The CEO claims that the average light bulb lasts 260 days. A researcher selects 25 bulbs for testing. The sample bulbs last an average of 250 days with a standard deviation of 20 days.
question suppose that y1 and y2 are random variables from population with mean micro and variance sigma2. suppose we
a producer of a cartain type of electronic component ships to suppliers in lots of twenty. suppose that 60 of all such
A sample of 64 Atlanta consumers showed a mean quarterly water bill of $51 with a sample standard deviation of $12. At α = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system?
what is the 25th percentile of a x2 distribution with 20 degrees of freedom? what symbol is used to denote this
Suppose that the number of calories in McDonald's Egg McMuffin is normally distributed random variable with mean of 290 calories and standard deviation of 14 calories.
hamilton county judgesread the hamilton county judges case study and please provide a managerial report that includes
The managers in a company’s East and West regions were rated on the basis of the company’s evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform this calcu..
the amount to fill in a half-liter 500 ml soft drink bottle is normally distributed. the process has a standard
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