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1. A survey of violence in schools is designed to estimate the percentage of male students who were threatened with violence on school grounds over the past year. the tolerable error is set at 1 percent and the level of confidence is to be 99 percent. what is the proper sample size? Please Show Work
2. National data shows that 22% of all college students are married. you believe the student body at walsh is "somewhat representative" of the national value. What sample technique is best suited for testing this assumption?
3. Brakes Shop Inc. is a franchise that specializes in repairing brake systems of automobiles. the company purchases brake shoes from a national supplier. Currently, lots of 1,000 brake shoes are purchased, and each shoe is inspected before being installed in an automobile. the company has decided, instead of 100% inspection to adopt an acceptance sampling plan. the quality control department of the company has decided to select a sample of 10 shoes and inspect them for defects. furthermore, it has been decided that if the sample contains no defective parts, the entire lot will be accepted. If there are 50 defective shoes in a shipment what is the probability that the entire lot will be accepted? Please show work
4. The makers of a soft drink want to identify the average age of its consumers. A sample of 16 consumers is taken. The average age in the sample was 22.5 years with a standard deviation of 5 years. construct a 95% confidence interval for the true average age of the consumers. Show work
families usa a monthly magazine that discusses issues related to health and health costs surveyed 19 of its
a manufacturer of plumbing fixtures has developed a new type of washerless faucet. let p p a randomly selected faucet
producers of pvc pipes want to have a supply of pipes sufficient to meet marketing needs. they wish to survey
suppose that a test for hepatitis c is 98 accurate in that if a person has hepatitis c the test will indicate positive
If we wish to be 95% certain of avoiding a Type I error, use these data to examine differences in the average distance traveled to the two clinics.
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?
the three-bolt connection shown in figure p1.8 must support an applied load of p 55 kips. if the average shear stress
Simplify each expression-Perimeter of a rectangle. The perimeter of a rectangular backyard is 6x+6 yards. If the width is x yards, find a binomial that represents the length.
the manager of the all-night corporation recently conducted a survey of 196 of its employees to determine the average
a coin and a die are tossed 10 times. what are the probabilities of the following outcomes?a getting exactly 4 heads
Question: A sample of 50 parts are inspected for a specific dimension with a resulting average of 2.22 and s = 0.67. What are the expected limits (lower and upper) of variation consuming 68% of the curve--assuming a normally-distributed process?
which of the following would not result in an increase in the power of anova?a. increasing the differences between the
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