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Find the minimum sample size required to estimate the percentage of college students who use loans to pay for college. Assume we want 95% confidence that the sample proprotion is within two percentage points of the true percentage
Answer to a problem based on statistical graphics.Create a c-bar chart and determine if corrective action is needed.
Findout the percentage of trainees earns less than $900 a month utilizing normal distribution.What percentage of trainees earns less than $900 a month?
Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 48 years of experience. Round to the nearest $100.
Is there a statistically significant difference between the bowling averages of male nurses and those of businessmen, if last year's league play produced the following data
First k is repeated (possibly by using some of the first k flips). Show that the expected number of additional flips after the initial k is 2^k?
Cast a die a number of independent times until a six appears on the up side of the die. Find the probability density function F(x)= P(X
Relatively speaking, who performed better on the test, you, with an 86, or your friend? Why?
From past estimates, manager thinks that about 4% of customers have expressed dissatisfaction. What sample size must you use for this survey?
Three consecutive even integers are such that the square of the third is 76 more than the square of the second. Find the three integers.
The mean and the standard deviation of a sample of 100 bank customer waiting times are 5.46 and 2.475 minutes, respectively. a) Assuming the distribution is bell-shaped, calculate the waiting time intervals containing 68% and 95% of bank customer w..
Suppose you know that the distribution of sample proportions of nonresidents in samples of 200 students is normal with a mean of 0.04 and a standard deviation of 0.03.
If 60 percent of those people chewing the gum are successful in stopping smoking, what is the probability that in a group of four smokers using the gum at least one quits smoking?
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