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What is the equation for the regression line if n = 7, ?x = 69, ?y = 528, ?xy = 4754 and x?² = 825
Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get the sample proportion of .35 or more.
What is the approximate probability that the total time spent on the calls will be greater than 98 minutes? Give your answer to four decimal places.
Using the probability distribution table, what is the value of P(X = 2 or X = 0)?
Dr Zak developed a test to measure depression. He sampled 100 university students to take his five item test. The group of students was comprised of 30 men and 70 women. In this group four persons were African American, six persons were Hispanic and ..
Develop a probability tree showing all marginal, conditional, and joint probabilities and what is the probability that a student selected at random failed the test?
A Cornell university study of wage differentials between men and women reported that one of the reasons wages for men are higher than wages for women is that men tend to more years of work experience than women. Suppose the following results were ..
For a sample of students in the college of business administration at mid-atlantic university, the mean grade point average is 3.10 with a standard deviation of 0.25.
The proportion of adults in the sample, as her estimate of p, the proportion of adults in the pond population. Find using the normal approximation with the continuity correction.
hat is sampling error? Could the value of the sampling error be zero? If it were zero, what would this mean? List the reasons for sampling. Give an example of each reason for sampling.
What is the probability that an employee will have a cold next year? Given that an employee is involved in an exercise program, what is the probability that he or she will ge a cold next year?
A deck of playing cards contains 52 cards, four of which are aces. What is the probability that deal of a five-card hand provides?
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
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