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The standard deviation of a normal random variable is 20. If a sample of 225 is selected out of a large population, what is the standard error of the mean? Round to 3 decimal places.
Statistics and Probability, Statistics
On average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 12.2 inches. Find the probability that a randomly selected part from this supplier will have a value between 85.3 and 109.7 inc ...
In a sample of 20 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 14.1 degrees. What would be the 95% confidence interval for the temperature of your cup of ...
Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 4%7%-2%40%0%10%-1% Stock Y 2%-5%7%4%6%11%-4% Consider a portfolio of 10% stock X and 90% stock Y. What is the (population) standard deviation of po ...
Most graduate schools of business require applicants for admission to take the GMAT, the Graduate Management Admission Test. Scores on the GMAT are roughly normally distribute with a mean of 527 and a standard deviation ...
In 20% of families the father has celiac disease (Event F) while the mother does not, in 15% of families the mother has celiac disease (Event M) and the father does not, and in 5% of families both the mother and the fath ...
A company is trying to beat the competition to market with a product. They have determined that if they get to market prior to November 1 they will have a revenue stream of $800,000. If they get to market between Novembe ...
At station A, the egg hatch rate (computed from a set of 100 eggs at a time) is known to follow approximately a normal distribution with mean 62% and standard deviation 5%. At station B, the egg hatch rates are known to ...
You ask your roommate to mail a letter for you. Suppose there is a 0.21 probability your roommate will forget to mail it. Should your roommate mail your letter, there is a 0.9 probability that Canada Post will deliver t ...
Explain how the company Newman's Own brand fulfills the definition of a business for profit and a non-profit business at the same time. Consider in the response the functions of business, entrepreneurship and production ...
A researcher selects from a participant pool of 8 males and 11 females. He determines that the probability of selecting 2 female participants is p = .335. Based on this probability, what strategy did the researcher use t ...
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