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When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random dialing machine make 20 calls.
What is the probability (0.0001) that exactly 2 calls reach a person?
What is the probability (0.0001) that 2 or fewer calls reach a person?
general population is skewed to the right the meand degree of affection is 60 standard deviation is 16. sample 100
How large a sample is required to estimate the mean speed with a margin of error equal to 2 miles per hour with 90% confidence?
What sample size is needed to estimate with 95 persent confidence the mean intake of calcium within 20 units of the true mean if the intake is normal with a variance of 1900 units?
The chance both flights are full is 0.6. Are the two flights being full independent events and What was the mean ranking for the females in this class
q1. consider an experiment that results in a positive outcome with probability 0.38 and a negative outcome with
He is equally likely to select any. Billy leaves last and takes the one remaining hat. Let x be the number of cowboys who end up with the correct hat.
select a company that u can visit in person or interviewon the telephone. call ahead to the company to arrange a time
He gets a result of 1.5. He then rounds the result to 2, saying that it is not possible to get 1.5 girls when three babies are born. Is this reasoning correct? Explain.
Mary claims that the range, standard deviation and variance are all measures of dispersion. John adds to Mary's claim by stating that the coefficient of variation is a measure of relative dispersion.
question given the following analysis of variance table for three treatments each with six
Assume the least squares equation is Y' = 10 + 20X. What does the value of 10 in the equation indicate? Y intercept. For each unit increased in Y, X increases by 10.
What is the probability that during 5 minutes interval no one will enter the store? b) what time interval is such that the probability is 0.5 that no one will enter the store during that interval?
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