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Given X~N(0,2) where ?=2, what is the 25th percentile of this distribution?
a) -0.67
b)0.67
c) -1.34
d) 1.34
e) none of the above
Suppose that you have a bag filled with 50 marbles, 15 of which are green. What is the probability of choosing exactly 3 green marbles if a total of 10 marbles are selected?
Test at a 95% confidence interval. What is the Hypotheses and indicate what is the sample proportion. What is the P-value and, in turn, what is your conclusion?
certain kinds of tumors tend to recur. the following data represent the lengths of time in months for a tumor to
an important application of regression analysis in accounting is in the estimation of cost. by collecting data on
Heights of college-aged women are approximately bell-shaped and symmetric, with almost all of them (95%) falling between 58" and 72". Find the approximate values of the mean and standard deviation.
define the random variable x to be the time you get home on thursday.a is x a discrete or continuous random variable?
random variable Y that has an exponential distribution with mean equal to 4 tons. The cost of the flour is proportional to U=3Y+1. Find the probability density function for U.
A certain type of tomato seed germinate 90% of the times. if a farmer plants 25 seed, What is the probability that: -exactly 20 germinates more than 19 germinates.
according to the sleep foundation the average nights sleep is 6.8 hours fortune march 20 2006. assume the standard
In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered.
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
a random sample of 12 second-year university students enrolled in a business statistics course wasdrawn. at the courses
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