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Randomly selected statistics students of the author participated in an experiment to test their ability to determine when 1 min ( 60 Sec) has passed. Forty students yielded a sample mean of 58.3 sec. Assume the population standard deviation is 9.5 sec. Construct a 90% confidence interval estimate of the population mean of all statistics students. List the margin of error and critical value. Interpret the confidence interval.
Determine how large a sample would be necessary to estimate the population proportion with a margin of error of .05 at 95% confidence
Find the percentage of the 1000 enemy that will be destroyed.
you want to compare years of schooling among american adults who describe their political veiwpoint as liberal moderate
a student has submitted a concrete cylinder to the strength contest in engineering open house. suppose the strength of
In a recent year Barry Bonds hit 73 home runs in the 153 games he played. Assume that his home run production stayed at that level the following season.
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
A travel agent suggests that since the law of averages makes it highly unlikely to have two plane crashes within a few weeks of each other, flying soon after a crash is the safest time. What do you think?
david is an insurance broker who believes that the probability of making a sale is 0.3.a find the mean and variance of
Suppose the time interval between two consecutive defective light bulbs from a production line has a uniform distribution over an interval from 0 to 90 minutes.
suppose we watch the price of the dow jones industrial index for three days.assume there is a 6040 chance that the
Mean output of solar cells of three types are measured six times under random light intensity over a period of 5 minutes, yielding the results shown. Research question: Is the mean solar cell output the same for all cell types?
A thorough examination reveals there is nothing wrong with the filling machine. From a statistical standpoint,was there a type error made? If yes, which type? Explain?
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