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1. A motel manager, concerned with customer theft of towels, decided that the theft rate might be reduced by changing from white, imprinted towels to a drab green version. Of the 120 guests provided with the white tow- els, 35% took at least one towel with them when they checked out. Of the 160 guests given the drab green tow- els, only 25% checked out with one or more towels in their possession. At the 0.01 level of significance, can we conclude that the manager's idea is effective in reducing the rate of towel theft?
2. An Internal Revenue Service manager is compar- ing the results of recent taxpayer interviews conducted by two auditors. Of 200 taxpayers audited by Ms. Smith, 30% had to pay additional taxes. Of 100 audited by Mr. Burke, only 19% paid additional taxes. At the 0.01 level of significance, can the manager conclude that Ms. Smith is a more effective auditor than Mr. Burke?
Use the normal distribution of women's total cholesterol levels in Exercise 9 for which the mean is 186 milligrams per deciliter and the standard deviation is 37.2 milligrams per deciliter.
a city ballot includes a local initiative that would legalize gambling. the issue is hotly contested and two groups
It's your first day at the Jedi Temple, working as a lightsaber manufacturer. Your first task on the job is to analyze the control and capability of this process. Your main concern is to see if the lightsabers fit within the required length specif..
An SRS of 25 faculty members at a large southeastern university found that 10 felt that the university was supportive of female and minority faculty. What is the p-value of your test
Use the binomial distribution in the Data Analysis add - in to simulate the distribution of men and women among the next ten arrivals at an emergency room, assuming that, on average, six people out of ten who arrive are men.
A manufacturer claims that the mean lifetime, mu, of its light bulbs is 44 months. The standard deviation of these lifetimes is 7 months. Seventy bulbs are selected at random, and their mean lifetime is found to be 43 months.
Identify the independent and dependent variables. Perform a regression analysis on the data.
a chemist who has prepared a product designed to kill a particular type of insect wants to evaluate the kill rate of
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
1 a random sample of size 100 was taken from a population. a 94 confidence interval to estimate the mean of the
if you know that 48 of children born are male what is the probability of having 2 girls and one boy in a family of 3
question a convenience store owner hypothesizes that the median number of snow cones he sells per day is 36. a random
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