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The business magazine Forbes estimated in 1995 that the "average" household welath of its readers was either about $800,000 or about $2.2 million depending on which "average" it used. Which type of "average" does the $800,000 represents?
What is the best point estimate of the mean weight of babies born to mothers who did not use cocaine during their pregnancies?
The number of gallons (measured in thousands of gallons) that this gas station sells per week. If Y = 340 - 90X, what is the expected value of the random variable Y?
The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 96 pounds. A random sample of 50 newly manufactured cables has a mean breaking strength of 1950 pounds.
Out of the total nuts manufactured by a company 0.5 percent became defective. The nuts are supplied in packets of 40. Find out the probability number of packets containing.
Explain in detail and give an original example of the four types of probability.
Standard deviation of $5,000. What is the lowest salary for those individuals with an MBA degree whose starting salary is in the top 10 percent?
Give a 99% confidence interval for the proportion of adults who attended church or synagogue during the week preceding the poll.
The final examination of a course requires an essay. The number of pages from a sample of 25 students were collected. The data are:
Figure out the necessary sample size to reduce sampling error to plus or minus $500. Do you need to have an estimate of the current mean income to answer this question? why or why not?
What does this story say about hypothesis testing and research? What is the likelihood of this happening? There are number of safeguards in place so this should not happen.
I have computed an analysis of variance for three groups with 10 observations per group. Evaluate the degrees of freedom for the F test
Assume your statistics professor reports test grades as z-scores, and you got a score of 2.20 on the midterm exam. Write down a sentence explaining what that means.
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