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Find out the probability of selecting a face card from the deck of 52 cards (face cards are jacks, queens, and kings)?
Some students were asked if they carry the credit card. Here are responses. Find out the probability that the student was a sophomore?
Faced with rising fax costs, a firm issued the guideline that transmissions of 10 pages or more must be sent by 2-day mail instead.
A digital camcorder repair service has set the goal not to exceed average of 5 working days from time the unit is brought in to the time repairs are completed.
In the 1,000 samples, supposing that H0 is true, how many times would you expect to commit Type I error if
Illustrate out the term sampling error. Could the value of sampling error be zero? If it were zero, what would this mean?
A state meat inspector in Iowa has been given assignment of determining the mean net weight of packages-Find out the estimated population mean?
Last year in the 400 random tests conducted, 14 employees failed test. Would it be reasonable to conclude that less than 5 percent of the employees aren't capable to pass the random drug test?
A recent survey of 50 executives who were laid off from their precedent position revealed it took a mean of 26 weeks for them to find out another position.
Supposing that all sample space outcomes are equaly likely, find out the probability of each of events given in part b.
A kindergarten class comprises of 14 boys and 11 girls. If the teacher chooses children from the class using random sampling.
For the normal distribution, find out the z-score values which separate
For population with mean of m = 100 and standard deviation of s = 10. Find out the score (X values) which corresponds to each of following z-scores.
Explain the distribution of sample means (shape, Expected value, and standard error) for samples of n=36 chosen from the population with mean of m =100 and standard deviation of s=12.
How likely is it to obtain the random sample of n=16 jurors with the average age greater than or equal to 48.9 Is it reasonable to conclude that this set of n=16 people isn't a representative random s
For the population with mean of µ=60 and standard deviation of s=24. Find out the z score corresponding to each of following samples.
The value of z score in a hypothesis test is affected by variety of factors. Supposing that all other variables are held constant, describe how the value of z is affected by each of the following:
Is this sample sufficient to conclude that the eye-spots have a significant influence on the birds' behavior? Use a two-tailed test with a = 0.05.
A researcher would to analyze the effects of humidity on eating behaviour. It is known that laboratory rats normally eat the average of m = 21 grams of food each day.
The AMI Company has 2 assembly lines in its Kansas City plant. Line A produces the average of 335 units per day with the standard deviation equal to 11 units. Line B produces the average of 145 unit
The State Department of Weights and Measures is liable for making sure that commercial weighing and measuring devices, such as scales, are accurate so customers and businesses aren't cheated.
A major tire manufacturer wishes to estimate mean tread life in miles for one of their tires. They want to develop the confidence interval estimate that would've the maximum sampling error of 500 mi
Conduct the hypothesis test using 0.05 level of significance and determine whether or not the company's claim is supported.
Woody is interested in estimating if workers are more concerned with the job security or pay. He gains the cooperation of 30 individuals who work in different settings and ask each employee to rate
Based upon this sample, is Moe correct in his assertion? Write down the formal commentary of results of your test (similar to the phrasing found in Cronk textbook).