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A random sample of 1001 University of California faculty members taken in December 1995 was asked, "Do you favor or oppose using race, religion, sex, color, ethnicity, or national origin as a criterion for admission to the University of California?" (Roper Center, 1996). Fifty-two percent responded "favor."
a. What is the population for this survey?
b. What is the approximate margin of error for the survey?
c. Based on the results of the survey, could it be concluded that a majority (over 50%) of all University of California faculty members favor using these criteria? Explain.
For a sample of 100 employees, a personnel direc- tor has collected data on x 5 the number of years an employee has been with the firm and y 5 the number of shares of company stock the employee owns. The data are in file XR02044. a. Generate a scatt..
Reconsider Eddie's Bicycle Shop described in Prob. 22.4-7. Forty percent of the bicycles require only a minor repair. The repair time for these bicycles has a uniform distribution between 0 and 1 hour.
create a bid to build a wall
a coin is tossed 7 times. let a be the event that the first toss is heads. let b be the event that the fifth toss is
The calcium (Ca) content of a powdered mineral substance was analyzed 10 times with the following percent compositions recorded: 0.0271 0.0282 0.0279 0.0281 0.0268 0.0271 0.0281 0.0269 0.0275 0.0276 a. Find a 99% confidence interval for the true calc..
Let μ be the hourly wage (excluding tips) for workers who provide hotel room service in a large city. A random sample of a number (more than 30) of such workers yielded a 95% confidence interval for μ of $8.46 to $9.86 using the normal distributio..
The following data represent a random sample of end-of-year bonuses for the lower-level managerial personnel employed by a large ?rm. Bonuses are expressed in percentage of yearly salary.
Use the t-distribution table to find the critical value(s) for the indicated alternative hypothesis, level of significance ?, and sample sizes n? and n?.
molly messimer has started raising funds to begin producing specialty fudge to sell. she estimates that renting a
q1. records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a
A company selects five of the machines at random, thinking all are in working condition. What is the probability that all five of the machines are nondefective?
How do you write a statistical analysis in which the emphasis is to compare the difference between the body mass index (BMI) values of men and women.
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