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Creating null and alternative hypotheses of difference based on the following. A company introduces a new product and wants to find out if males or females will be more likely to purchase it. The company will survey 100 males and 100 females.
Make up the ages of a group of participants who are freshman, sophomores, juniors, and seniors. You will need the age of 10 participants across each level.
A radio station in Myrtle Beach announced that at least 90% of the hotels and motels would be full for the Memorial Day weekend. The station advised listeners to make reservations in advance if they planned to be in the resort over the weekend.
bob wishes to insure a priceless family heirloom against theft. the annual premium for policy a is 150 and it will pay
questionthe monthly average sales of the smiling ninja computer company may be approximated to a normal distribution
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
How many golfers must be surveyed if we want % confidence that the sample proportion has a margin of error of 0.025?
a random sample of 100 credit sales in a department store showed an average sale of 120.00. from past data it is known
what is the taguchi constant for a device that costs 400 to repair and a tolerance of plus or minus 0.5 mm with a mean
A recent study of 75 workers found that 53 people rode the bus to work each day. Find the 95 percent confidence interval of the proportion of all workers who rode the bus to work.
If you want to construct a confidence interval to be used for testing the claim that graduate students have a mean IQ score that is greater than 100, and you want the test conducted with a significance level of 1%, what confidence level should be ..
A recent study of 25 students showed that they spent an average of $18.53 for gasoline per week. the standard deviation of the sample was $3.00. find the 95% confidence interval of the true mean.
the world health organization estimates that 5 of all adults in sub-saharan africa are living with hivaids. a survey
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