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Suppose the heights of a population of people are normally distributed with a mean of 70.5 inches and a standard deviation of 2.7 inches. a. Find the probability that a randomly selected person from this population is between 67.2 and 71.2 inches tall. b. What height denotes the 95th percentile?
Find an organization you think would be interested in data that would violate the measurement scale or known distribution assumptions necessary to use.
The scores on an exam are normally distributed with mean 74 and standard deviation 9 points. What is the probability a random student scored.
you want to test a research centers claim that less than 35 of college applications are submitted online. a hypothesis
For the situation in given Exercise, what is the probability that Sheila will visit the franchise 5 times without winning a free hamburger?
The standard deviations s1 and s2 can be used when Ó1 and Ó2 are unknown and you believe that the underlying distribution is normal. Then, you would use s1 and s2 with the t-test for hypothesis testing.
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
a. What grade must you exceed to obtain an A? b. What grade must you obtain to pass the course with a C or better?
When would you use a hypothesis test for the difference in two population proportions at your place of employment?
the amount of money college students spend each semester on textbooks is normally distributed with a mean of 195 and a
It is known that a certain prescription drug produces undesirable side effects in 35% of all patients who use it. Among a random sample of eight patients using
Redo the inital calculation one more time using $50,000 in annual savings for the first six years and $30,000 in annual savings for the next six years.
Find the probability of each outcome.- The first two you choose are both good.- At least one of the first three works.- The first four you pick all work.
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