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If data collected in earlier surveys have shown σ to be approximately equal to 10, how many hunters should be included in the survey?
Discuss what is measured by the sample standard deviation. Calculate the estimated standard error for sample mean and discuss what is measured by standard error.
What graph is appropriate for the study on the effect of age on pulse rate?
The laboratory science possibilities are astronomy, biology, chemistry, geology, and physics. In humanities, the available courses are classics, French, English, and history. How many three-course s
In the production procedure, a product goes through one of assembly lines A, B, or C and then goes through one of finishing lines D or E. Draw a tree diagram which points out the possible production
Suppose you own a reliability system that consists of two components connected in series, with the first one having reliability of 0.93 and the second having .89.
A magazine conducted the survey among its readers in certain state. They reported the following results: Out of 1200 respondents, 312 are professionals, 470 are married, 524 are college graduates, 1
Determine the sample size necessary to estimate µ for the following information.
Suppose 15% of the trees in the forest have severe leaf damage from air pollution. If 5 trees are selected at random, find the probability that:
If you want to be 95% confident of the estimating the population proportion to in a sampling error of ±0.05, what sample size is required?
Assume that the study was based upon 500 small business owners. Develop 95% confidence interval estimate for the population proportion of small business owners who never check in on office when on v
A survey of 655 workers were asked how much they employed the internet at work. 378 said they employed it in limits, and 148 said they did not employ internet at work. Make a 95% confidence interval
A set of final examination markes in a calculus course was found to be basically distributed with mean of 70 and standard deviation of 10. Only 1% of the students taking the test scored higher then
Supposing that the population of tread wear indexes is normally distributed, construct a 95% confidence interval estimate of the population mean tread wear index for these tires.
Samples of four units were taken from engine manufacturing procedure. The weight of the engine was measured (in lbs), and average and range was computed for each sample. After 25 samples, the follow
Assume a force acting on column which aids to support the building is normally distributed with the mean 15.0 kips and standard deviation 1.25 kips. Determining the probability that the force:
What would the formula be if you were playing 75 ball bingo using a 24 space bingo card and getting a single bingo (4-5 balls)
A manufacturer of nickel-hydrogen batteries randomly chooses 100 nickel plates for test cells, cycles them specified number of times, and determines that 20 of plates have blistered.
Determine the planning value for population standard deviation? How large a sample must be taken if the desired margin of error is:
The average tread wear was found to be 50,000 miles with the standard deviation of 3,500 miles. Determine the best estimate of the average tread life in miles for the entire population of these tire
Truck tire life is basically distributed with the mean of 60,000 miles and standard deviation of 4,000 miles. Determine the probability that tire will last 72,000 miles or more?
In the experiment to find out the effect of curing time on compressive strength of concrete blocks, two samples of 14 blocks each were prepared identically except for curing time.
Find out the probability that at least ten failures are because of a problem with the inside wiring. Would it be unusual if at most five were due to problems with inside wiring? Describe, based upon
Both James as well as Fred brought in the can of chicken noodle soup for lunch. James' can of soup has diameter of 5 inches and a height of 6 inches.
Car manufacturers advertise gas consumption for newest cars. Standards require mileage estimates to be within a plus or minus .5 of the actual average with a 99% confidence level. A new model gets