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1. A normal distribution Y has mean 50 and standard deviation 8. Find P(Y<44).
2. A normal distribution Y has mean 50 and standard deviation 8 find P(40<Y<60).
3. A normal distribution Y has mean 50 asd standard deviation 8 find P (30<T<62).
4. The response time for Denver police to respond to emergency calls is 8.4 minutes with a standard deviation 1.7 find the probability that the response time for a call between 5 and 10 minutes.
Is the hot-air balloon significantly shorter than light rail? How can you tell? What do you tell university officials?
How likely is it that the store owner will make at least $7,000 if she implements your suggestion?
The results are shown here. At Alpha = .01, can it be concluded that the sessions help to improve the students' mathematical skills?
What is our decision regarding differences between observed and expected frequencies if critical value of chi-square is 9.488 and computed value is 6.079.
Determine if the sample result indicates that the population variance is decreased from historical value of 0.35. At alpha = 1%, give values for test and critical statistics.
Suppose the organizers of the study are reconsidering their sample-size estimate. How many participants should be enrolled in each of the active and control intervention groups to achieve 80% power if a two-sided test is used with α = .05
computing the expected values for the given probability distribution.find the expected values of the following
If the names of these 100 people in the building are still unknown but a room is allowed to lodge one tenant at most , then are there how many ways of room occupation?
In total, of 1000 applications they got from men, they hired 625, or 62.5%. Based on numbers presented, what do you believe of the discrimination claim?
If the standard deviation in the above-described scenario had been, how would the results of the hypothesis test change?
The following problem develop the concept of determining the probability distribution of random variable and its mean and variance.
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.
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