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From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 20.53 with a standard deviation of 3.23. What is the 95% confidence interval for the amount of time spent on administrative issues?
Suppose the returns of a particular group of mutual funds are normally distributed with a mean of 12.4% and a standard deviation of 4.7%. If the manager of particular fund wants his fund to be in the top 5% of funds with the highest return, what ..
Find the probability that x is less than or equal to 8 using the normal approximation to the binomial and what is the probability that less than 7 of the calculators will be defective?
What graph would we display our information if we have measured page thickness from a starting point in the book to a ending point and did this trial 10x. Is a histogram best?
The first requires 60 sq. inches of material and the second requires 100 square inches. The company has 1,000 sq. feet of material. what is the model?
need answers to questions on test.the file is attached with all the questions would like answers for all of
A certain college has g good courses and b bad courses, where g and b are positive integers. Alice, who is hoping to find a good course, randomly shops courses.
In an article in Science, Turner et al. (1998) describe the use of audio, computer-assisted self-interviews as part of the 1995 National Survey of Adolescent Males (aged 15 to 19).
If the salaries are normally distributed with a standard deviation of $5000 (s = 5000), find the probability that:
what is the standardized score of a mean of 230 taken from a sample of 25 from a normal population that has a mean of
What is the probability that the shipment would be accepted?- To increase the probability of acceptance to at least 90%, it is decided to do one of the add some good pins to the shipment.
the following sample data are from a normal population 1 19 11 12 2 2 12 19.a. what is the point estimate of the
To begin with, I have an example problem that asks to find a complete solution for: y'+ 2xy = x. The text says to multiply both sides by e^int a(x) dx
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