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Question: A company that conducts surveys of current jobs for executives wants to estimate the average salary of an executive at a given level to within $2,000 with 95% confidence. From previous surveys it is known that the variance of executive salaries is about 40,000,000. What is the minimum required sample size?
What is the critical F value for a sample of four observations in the numerator and seven in the denominator?
Find the probability that every person who shows up for the flight will find a seat available - If a country has 100 nuclear plants, estimate the probability that there is at least one such accident during a given year.
an urn contains nine white balls and 11 black balls. a ball is drawn and replaced. if the ball is white your opponent
Refer to Exercise 8.41 (page 517). The estimated proportion of undergraduates owning a phone in 2000 was 43%. We want to test whether the proportion of undergraduate cell phone owners has more than doubled in the last 4 years.
The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall semester on the basis of past experience, What is the expected number of admissions for the fall semester
Find the probability that the sum of the 95 values is greater than 7,650? Find the probability that the sum of the 95 values is less than 7,400?
Analyze whether or not patients undergoing this treatment are illustrating significant change from baseline to 3 months afterward. Report a p-value.
a seven-year medical research study reported that women whose mothers took the drug diethylstilbestrol des during
thirteen percent of the adult population is left-handed. of the first 44 presidents of the united states seven are
The rest have no opinion. " Suppose that a a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
heights of 10 year old girls follow an approximately normal distribution with mean of 54.4 and a standard deviation of
State which model the data follow and plot the scatter diagram.- Do you expect the r to be positive or negative from looking at the scatter diagram? Should b be positive or negative?
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