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The length of time to complete a door assembly on an automobile factory assembly line is normally distributed with mean 6.7 minutes and standard deviation 2.2 minutes.
A company has observed that there is a linear relationship between indirect labor expense (ILE) , in dollars, and direct labor hours (DLH). Data for direct labor hours and indirect labor expense for
In a study to determine the mean IQ score of college students, 450 students were randomly selected and the mean IQ was found to be 103. Conduct a hypothesis test that uses a 0.05 significance level
Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second facto
Assume that a procedure yields a binomial distrubition with n trials and the probability of success for one trial is p. Use the given values of n and p to find the mean and standard deviation. Also
An airline has a policy of booking as many as 23 persons on an airplane that can seat only 22. Past studies have revealed that only 87% of the booked passengers actually arrive for the flight.
Assume that a procedure yields a binomial distrubition with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success o
In designing an experiment involving a treatment applied to 5 test subjects researchers plan to use a simple random sample of 5 subjects from a pool of 65 available subjects. Answer below. How many
Most of the live characters at an amusement park have height requirements with a minimum of 4 ft 9 in. and a maximum of 6 ft 3 in. Find the percentage of women meeting the height requirement. Find
If a particular shipment of thousands of aspirin tablets actually has a 3.0% rate of defects, what is the probability that this whole shipment will be accepted?
Consider a bag that contains 224 coins of which 6 are rare. For the given pair of events A and B complete part A and B. A. when one of the coins is randomly selected it is one of the rare. B. When
A lawyer researched the average number of years served by 45 different justices on the Supreme Court. The average number of years served was 13.8 years with a standard deviation of 7.3 years. What i
A bag contains 12 colored balls, each ball being either black or white. The probability of drawing a white ball twice with replacement is 1/16. How many white balls are in the bag? Place your answer
A sport preference poll yielded the following data for men and women. Use a 5% significance level and test to determine if sport preference and gender are independent.
The upper limit of the 90% confidence interval for the population proportion p, given that n = 100; and = 0.20 is
If the plaza is not built, Harry thinks his downtown business will decline about $50,000. Time is of the essence; the mall owners need an answer immediately or he will lose any chance to locate ther
Suppose the scores on an examination are normally distributed with a mean of 45 and a standard deviation of 8. What is the probability that the score of a student will be less than 52.6?
Find an interval centered on the mean in which we can expect at least 85% of the data to fall.
What is the probability that the sample mean FNE score is greater than 17.5? What is the probability that the sample mean FNE score is between 18 and 18.5?
A test for marijuana was tried on 210 subjects who did not use marijuana. The test result was wrong 52 times. Based on the availiable results find the probailbity of a wrong test result for a person w
Twenty of the 100 DVD players an inventory are defective. What is the probability you randomly select one that is not?
Jeff has an opportunity to invest his money. He can make a profit of $8000 with a probability of 0.4, a profit of $ 15,000 with a probability of 0.35, or he could lose $12,000 with a probability of
If the government permanently increases the price of potato chips (through a taxes), how will the price change affect the price elasticity for potato chips over time? Explain