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Suppose that 18% of the employees of a given corporation engage in physical exercise activities during the lunch hour. Moreover, assume that 57% of all employees are male, and 12% of all employees are males who engage in physical exercise activities during the lunch hour.
a. If you choose an employee at random from this corporation, what is the probability that this person is a female who engages in physical exercise activities during the lunch hour?
b. If you choose an employee at random from this corporation, what is the probability that this person is a female who does not engage in physical exercise activities during the lunch hour?
a researcher is studying the relationship between earnings for major electronic firms and research and development
Find the sample mean and find the sample standard deviation - construct a confidence interval for the true population mean for body temperatures of healthy adults.
A manufacturer of "low precision" 10 mm diameter ball bearings periodically takes samples and measures them to con?rm that the manu- facturing process is still on target. A random sample of 20 ball bearings resulted in diameter measurements with a..
in a simple random sample of 80 automobiles registered in jland 28 of them were found to have emission levels that
a random sample of size 34 is to be selected from a population that has a mean ? 45 and a standard deviation ? of 10.a
Suppose that a judge's decisions are upheld by an appeals court 90% of the time. In her next 10 decisions, what is the probability that 8 or more of her decisions are upheld by an appeals court
three coins are placed in a box. a quarter a dime and a nickel. one coin is drawn at random and not replaced. a second
XTRA Inc. has beginning-of-the-year present values for its projected benefit obligation and market-related values for its pension plan assets.
Solve by completing the square: Solve using the square root property:
A high school teacher correlated the math test scores and scores on a motivation scale for her 9th graders. She was delighted to find a high correlation between the two sets of scores. Later in the semester she correlated the math test scores of ..
How to find the weight with a height that does not fall on the SD line - Suppose the following girls fell exactly on the SD line. The table below gives their heights, you fill in their weights. (Don't type in "lbs.")
1. If an invested amount is to double in seven years, find the nominal interest rate at which it must be invested if interest is compounded quarterly.
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