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The heights of women in the U.S. have been found to be approximately normally distributed with a mean of 63.4 inches and the SD to be 3.75 inches.
a) What percent of women are taller than 64.41 inches?
probability =
b) What percent of women are shorter than 62.77 inches?
c) What percent have heights between 62.77 and 64.41 inches?
An accounting professor wants to know if students perform the same on the departmental final exam irrespective of the accounting section they attend.
Find the empirical probability that an iris bulb of this type will bloom. Give answer as a fraction in lowest terms. How many of the bulbs should she plant next fall if she would like at least 52 to bloom?
The station was successful in getting contributions from 26% of the members they e-mailed but only from 15% of those who received the request by regular mail.
(a) What is the probability that two randomly selected tulip bulbs are both red? (b) What is the probability that the first bulb selected is red and the second yellow? (c) What is the probability that the first bulb selected is yellow and the second ..
Given that IQ scores are normally distributed, have a mean = 100, and standard deviation = 15, between which IQ scores do the middle 25% of IQ scores fall?
The data is given below. At 0.05 significance level, test the research hypothesis that μ, the average ratio, is greater than 675. Test the hypothesis using two approaches: the rejection region approach, and the p-value approach.
Pets. The American Veterinary Association claims that the annual cost of medical care for dogs averages $100, with a standard deviation of $30.
there are 5 identical looking coins in your pocket. two of the coins are fair while the other three are biased so that
Find the probability that the number that say they would feel secure is? (a) exactly? five, (b) more than? five, and? (c) at most five.
Construct a 90% confidence interval for the proportion of students at a school who are left handed. The number of students at the school is N = 500. In a random sample of 82 students, selected without replacement, there are 9 left handers.
the following data show the number of fruit fly killed at varying concentrations of nicotine.the number of ies killed
A message arrive at a switch board in poisson distribution manner at an average rate of six per hour. Find the probability for exactly two messages arrive within one hour, no message arrive within one
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