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The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 5400 miles. If the manufacturer guarantees the tread life of the tires for the first 53,520 miles, what proportion of the tires will need to be replaced under warranty?
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
a random sample of 21 ncaa division i mens basketball games during the 2009-2010 season had an average attendance of
What descriptive statistics were used in the study
Compute the length-of-life value for which 10% of the watch's batteries last longer.
To test there is significant difference among the mean of income using ANOVA. A developer of real estate is considering investing in a shopping mall on the outskirts of Atlanta, Georgia.
the economy may be headed for recession. as the manager of a bank you would like to know the average income of the
Suppose in fact that 47% of the population favors this idea. Use the normal distribution to calculate the probability that at least half of the sample are in favor.
Why efficiency in markets with incomplete information present lower than in those with perfect information.
by studying the grade distributions in calculus over several years it was determined that the probability of a student
1.a forester wishes to predict the volume in cubic feet of usable lumber in a certain species of tree using the height
what percentile is associated with a t score of 39? how do you work it
Use a 0.05 significance level to test the claim that unfiltered king-size cigarettes have a mean tar content greater than that of filtered 100 mm cigarettes.
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