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Weights of Pacific Yellowfin tuna follow a normal distribution with mean weight of 68lb and standard deviation 12 lb.
A. Find the weight that corresponds to z = -1.35
B. What weight represents the 95th percentile?
C. What weight represents the third quartile?
While exploring data that was collected for an investigation of resources needed for software testing and improvement, you have found an outlier.
Testing for population proportion - evidence that the proportion of data processing clerks who have gone through the new training and are no longer employed is less than .25?
compare the mean for the heights of males which is 69.78 and the mean for the heights of females which is 67.08.
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
By using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 4.3?
the results of a major citys restaurant inspections are available through its online newspaper. critical food
a common mistake many statistics students make is saying we accept the null or prove the null instead of fail to
Create a research question for one of the following groups: students, children or women. Include the independent and dependent variables you would study, an explanation of whether a one or two-tail test is most appropriate
the number of bank robberies that occur in a large north american city is poisson distributed with a mean of 1.8 per
grear tire company has produced a new tire with an estimated mean lifetime mileage of 37500 miles. management also
A local tire dealer wants to predict the number of tires sold each month. He believes that the number of tires sold is a linear function of the amount of money invested in advertising.
Assume that a 95% confidence interval estimate of the new annual starting salary is desired. How large a sample should be taken if we do not want to exceed $500? What do you know?
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