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Q1. If n = 10 and p = 0.70, then calculate the mean, standard deviation and variance of the binomial distribution.
Q2. Suppose that the probability of parents having a child with blond hair is 1/4. If there are 6 children in the family, find the probability that half of them will have blond hair.
Q3. A quality inspector picks a sample of 10 tubes at random from a very large shipment of tubes known to contain 20% defective tubes. Find the probability that only 2 of the tubes picked are defective.
Q4. A service facility has an average arrival of five customers per hour. Calculate the probability that exactly two customers will arrive at the service facility per hour.
The number of passengers arriving at an airport terminal average 1200 each hour. To process passengers (check in, take luggage, etc) take an average of 6 minutes each. There are 6 airport staffers processing passengers. How long is the average wai..
The manufacturer of Winston Tire Company claims its new tires last for an average 40,000 miles. An independent testing agency road-tested 20 tires to substantiate the claim made by the Winston Tire Company.
Construct a 95 percent confidence interval for the true mean.
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.
question each time that a shopper purchases a tube of toothpaste she chooses either brand a or brand b. suppose that
The area under the standard normal probability distribution is?b. the area under the standard normal probability distribution is? c. the area under the standard normal probability distribution is?
1. Consider the following data on distances traveled by people to visit the local amusement park.
What critical values should replace 1.645 and 2.326 in order to apply a Bonferroni correction to this multiple testing situation? What would the result of the Bonferroni correction be in terms of stars?
A California lawyer practices law, on the average, for 30 years. Assuming these members remain steady, how many lawyers would you expect California to have in 2050.
In the past, only 5% of these diskettes have had bad sectors. If the company wishes to set 99.7% control limits based on samples of size 500, what would these limits be?
Discuss how t test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score.
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