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Suppose at random 45% of school children develop nausea and vomiting following holiday parties and that you conduct a study to examine this phenomenon, with a sample size of n=18. What is the probability that less than 3, or more than 18 children become sick?
Assume a mean wage of $1,000 and standard deviation of $100. What's the probability of finding an employee with a wage of between $790 and $1000?
a teacher instituted a new reading program at school. after 10 weeks in the program it was found that the mean reading
How many more observations are necessary for the efficiency expert to be 95% sure that the point estimate x¯ will be in error from the true mean p by at most 15 seconds and find a 75% confidence interval for the population mean number of cars per su..
listed below are the playing times in seconds of songs that were popular at the time of this writing. find the amean
Give a 95% confidence interval and a 90% confidence interval for the average length of a long-distance phone call during weekends.
A data set comprises of set of numerical values. Which, if any, of the following statements could be right? Point to whether given statement could apply to data set consisting of 1,000 values which are all different.
A) What is the name of the distribution of the number of satisfied customers from this sample? B) What is the expected value? C) What is the standard deviation?
It is not known what proportion p of the purchases of a certain brand of breakfast cereal are made by women and what proportion are made by men.
Discus the importance of Jimmey Doolittele in World War?
It is often stated in three-shift manufacturing organizations that the quality of work on the second shift is worse than on the first, and that the quality of work on the third shift is worst of all. How would you go about testing that premise?
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
Jared bets on the number 7 for each of 100 spins of a roulette wheel. Because P(7) = 1/38 he expects to win two or three times. What is the probability that Jared will actually win two or more times?
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