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With a 98% level of confidence a company producing street signs wants to make sure the length of their product is meeting quality standards.
Error of 1cm and the production manager knows that the Standard Deviation 6cm. How many signs does he need to sample?
The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
Let the probability of a decreasing employment be 0.6 and the probability of a positive economic trend 0.5. Further, assume that the probability of a decreasing employment given a negative economic trend is 0.7.
A process follows the binomial distribution with n = 8 and p = .3. Find
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
what is the sample space of all possible outcomes? Are the outcomes equally likely?
Graph the information using a histogram and a scatter plot in Excel as well. How does seeing the information in a graphical format provide more information?
A previous study of nickels showed that the standard deviation of the weight of nickels is 150 milligrams.
What fraction of the calls last between 4.2 and 5 minutes?
The sample size n , the sample means, and the sample standard deviations for the two groups are given below.
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
There are 20 qualified applicants for 5 trainee positions in a fast-food management program. How many different groups of trainees can be selected?
WNAE, an AM station totally dedicated to deliver news, found that while the Distribution of listeners tune in the station follows the normal Distribution.
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