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Stores A, B, and C, have 50, 75, and 100 employees and respectively 50%, 60%, and 70% if these employees are women. Resignations are equally likely among all employees regardless of sex. One employee resigns and she is a woman. What is the probability that she works in Store C?
Suppose E and F are mutually exclusive events of an experiment. Show that if independent trials are performed of this experiment, the E will occur before F with the probability P(E) / (P(E)+ P(F)).
Assume that 5% of men and only .25% of women are colorblind. A colorblind person is chosen at random:
Report the t-value, whether you accept or reject Ho, and whether the difference was significant in a brief sentence.
a. What is the probability of a type I error? b. Give the formula for the test statistic.
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results:
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative.
Each year the local country club sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
With a Rejection Region of 8, 9 or 10, what is the probability of a Type II error, if the job applicant has a probability of identifying the odd sample with p = 0.5?
Determine the dependent variable(s)? Determine the value of the statistic? Write down the name of one variable not mentioned in this study that one might wish to control for.
In a poll to estimate presidential popularity, each person in a random sample of 1000 voters was asked to agree with one of the following statements:
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
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