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There is a certain disease in America which is very rare. The probability of a person having the disease is 1 in 100,000,000. Assume that there are 310,000,000 people in the US.
a) Approximate the probability that no one in the US actually has the disease.
b) Approximate the probability that at most 3 people in the US have the diseas.
Out to right, create a 90% confidence interval estimate of sigma (σ), population standard deviation.
consider two components whose lifetimes x and y are independent and exponentially distributed with parameters lambdax
If the service manager wants to 95% confident that the overall time is correctly estimated, with a 3 percent probability of error, what sample size should be taken.
What is the p value? Describe the steps in formal hypothesis testing. Make at least one comment for each step.
test the hypothesis that the mean μ = 100 against the alternative μ ≠ 100. Find the type II probability when the true mean heat evolved is 103.
The Money & Investing section of The Wall Street Journal contains a summary of daily investment performance for stock exchanges, overseas markets, options, commodities, futures, and so on.
Bolts are randomly selected until a 5 mm bolt is obtained. The outcomes are the sequences of bolts that can be selected. So one outcome is 1, and the other is 342. List the equally likely outcomes.
The five year surival rate for Caucasians for all forms increased from 37% in 1960 to 58% now. Express this change in two ways (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent.
Normalized matrix for one decision criterion at Firm T is given below.
Show some work for each part. A diagram can be helpful. A survey of adults found the following: 65 percent of the adults drink coffee. 35 percent drink tea. 80 percent drink coffee or tea (or both). If we choose a surveyed adult at random, find t..
Find the standard error of the mean. Also establish an interval estimate around the sample mean using one standard deviation of the mean.
"Correlation does not imply causation" is a phrase that emphasizes that correlation between two variables does not automatically imply that one causes the other
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