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Employment data at a large company reveal that 70% of the workers are married, 36% are college graduates, and half of the college graduates are married. What is the probability that a randomly chosen worker is:
a. neither married or a graduateb. married but not a graduatec. married or a college graduate
The monthly utility bills are normally distributed with a mean value of $130 and a standard deviation of $15.
The mean output power is 42 watts, with a standard deviation of 8 watts Assuming a confidence level of 95%, which of the following statements do these data support?
If a random sample of 5 observations from one population results in a standard deviation of 12 and the other random sample of 7 observations results in a standard deviation of 7.
Job Interviews: Based on information from MRINetwork, some job applicants are required to have several interviews before a decision is made. The number of required interviews and the corresponding probabilities are: 1 (0.09); 2 (0-31); (0.37); 4 (..
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
If 36 women are selected at random, find the mean, and standard deviation, of the population of sample means. Suppose that the sampling is done without replacement and use a finite population correction factor.
Consumer Reports magazine tested paints. The table below shows the overall quality score and cost in dolllars per gallon. Test for a correlation. Based on these results, do you get better quality paint by paying more?
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random.
A hypothesis will test that two population means are equal. A sample of 10 with a standard deviation of 3 is selected from the first population and a sample of 15 with a standard deviation of 8 from the second population.
A deck of playing cards contains 52 cards, four of which are aces. What is the probability that deal of a five-card hand provides?
Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
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