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64% of the workers at Motor Works are female, while 66% of the workers at City Bank are female. If one of there companies is selected at random (assume a 50-50 chance for each), and then a worker is selected at random, what is the probability that the worker will be female? Express as a percentage
What are the maximum and the minimum values in the entire set of data? List the actual values in the fourth row. List the actual values in the next to the last row.
The changing ecology of the swamps in Louisiana has been the subject of much environmental research. One water-quality parameter of concern is the total phosphorous level.
The mean annual salary paid to all employees in a company was EURO 30.000. The mean annual salaries paid to male and female employees of the company were EURO 32.000, and 24.000, respectively. Determine the percentage of males and females employed..
Find the critical value for a two tailed F-test with alpha=.05 when the sample size from which the variance for the numerator was obtained was 21 and the sample size from which the variance for the denominator was obtained 12
What is the median number of CDs owned? What is the 40th percentile? What is the range of the number of CDs owned? What is the standard deviation of the number of CDs owned?
Consider the following number of defective circuit boards produced by two different machines on seven randomly selected days. To three decimel places what is the mean of machine A?
What say? Does the application temperature make a difference (...test at the α= .05 level)? Then, is porcelain hardness that results from pressure setting #4 different from the others (...build the Scheffé shading contrast between setting #4 and ..
question samples of size n 5 are collected from a process every half hour. after 50 samples have been collected we
Determine the mean and standard error of the x - bar distribution.
The United States Postal Service reports that 95 percent of first class mail within the same city is delivered within two days of the time of mailing. Six of the letters are randomly sent to different locations.
A random sample of 20 single men were asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that at least 18 of the men will say yes.
Derive the standard error of proportion, the margin error and the 95% confidence interval for the proportion indicating preference to flirting.
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