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Find the indicated quantities given that X is a normal random variable with a mean of 30 and a standard deviation of 1.5. (Round your answers to 4 decimal places.)
(a) Find the value of b such that P(X ? b) = 0.8944
(c) Find the values of A and B such that P(A ? X ? B)= 0.8764 if A and B are symmetric about the mean.
If a member of the sales force submits an entertainment expense (dinner cost for four) of $190, should this expense be considered unusually high (and possibly worthy of investigation by the company)?
A researcher reports an F-ratio with df = 3, 36 from an independent-measures study. How many treatment conditions were compared in the study?
q1 the average age of ceos is 56 years. assume the variable is normally distributed. if the standard deviation
The normal model N (58, 21) describes the distribution of weights of chicken eggs in grams. Suppose that the weight of a randomly selected chicken egg has a z score of 1.78. What is the weight of this egg in grams? Round to the nearest hundredt..
When comparing data from different distributions, what is the benefit of transforming data from these distributions to conform to the standard distribution?
Recent studies have shown that the super-cooling temperature of terrestrial frogs frozen at -6°C has a relative frequency distribution with a mean of - 2°C and a standard deviation of 0.3°C (The first of these studies was reported in Science, May ..
You have been hired as a consultant to Medlark. Your job is to determine how many tickets to sell. Explain your solution completely and write your recommendation to the company.
You have a standard deck of cards and you take out 2 cards at random. Let Y1 represent the number of red Queens in your sample and let Y2 represent the number of spades in your sample.
I run various A/B Split tests online. I always set all my tests for 10,000 visitors so page A and B are each equally rotated 5,000 times.
a sample standard deviation of 1.1%. Using alpha = 0.05, does the analyst have statistical evidence to reject the claim made by the magazine?
according to u.s. news amp world report data in 1995 tuition costs at indiana university a public university were 2984
How many more students should be included in the sample to be 99% sure the sample mean x is within $7 of the population mean u for all students at this college?
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