Alternate hypothesis for a one-sided test
It is claimed that in a bushel of peaches, less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the alternate hypothesis for a one-sided test?
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What is the probability that a randomly chosen 10-card hand has exactly three three-of-a-kinds (and no four-of-a-kinds)?
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 191 lb. The new population of pilots has normally distributed weights with a mean of 136 lb and a standard deviation of
The mean score of the overall population of high school seniros is known to be 455 with a standard deviation of 100. the mean score for thsoe who took the course was 500. Compute the effect size of the new preparatory course?
Find the expected number of games that you play. Find the expected number of games that you lose.
At Mike's Auto Service, the mean time to diagnose a problem is 30 minutes with a standard deviation of 8 minutes. The mean time to perform the repairs once the diagnosis is complete is 180 minutes with a standard deviation of 45 minutes. Find the
In a recent health survey, 390 randomly selected college undergraduates were asked, "Regarding your current weight, do you feel that you're: 'About right', 'Overweight', or 'Underweight'?" A contingency table summarizing the results of this survey
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The television show Pretty Betty has been successful for many years. That show recently had a share of 16, meaning that among the TV sets in use, 16% were tuned to Pretty Betty. Assume that an advertiser wants to verify that 16% share value by con
Two marbles are chosen at random from a box that contains 5 red and 5 blue balls. If the balls are the same color, you win $1.10 ; if they are different colors, then you lose $1.00. Let W be the amount that you win. Calculate the mean and the vari
A study found that the average time it took a person to find a new job was 3.5 months. If a sample of 30 job seekers was surveyed, find the 90% confidence interval of the mean. Assume the standard deviation of the sample is 0.5 month.
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