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a normally distributed population of scores has a mean of 1000 and a standard deviation of 64. what percentage of scores fall below a score of 872?
in a normal distribution with a mean of 10 and a standard deviation of 2, what actual score corresponds to a z-score of +1.67?
a school only accepts students with the top 20% of sat scores. the sat has a mean of 500 and a standard deviation of 100. what actual score should be used as the cut-off score?
Income Trevor is interested in purchasing the local hardware/sporting goods store in the small town of Dove Creek, Montana.
What is meant by the probability of an event? Discuss how addition and multiplication techniques are used to solve probability problems.
Mike works in a quality at a well known saw blade company. An inpsector on his team has uncovered an issue with the kerf dimension on the bandsaw blade line.
Sketch the areas under the standard normal curve over the indicated intervals, and find the specified areas.
Interpret a scatter diagram - Explain the relationship between the hours each student of a school spends in after school jobs each week and their grade average.
Death during the next year for a person of your customer's age, sex,health etc is 0.002. What is the expected gain (amount of money made by the company) for policy of this type?
In particular, discuss whether there is enough information presented in the article to arrive at the same conclusion as reported."
A multicenter clinical trial involving 17,000 patients suspected of having acute myocardial infarction was conducted. The vascular death rate after 5 weeks was compared in patients receiving aspirin versus those not receiving aspirin
Use the steps of hypothesis testing; (b) figure the effect size for the study; And (c) explain your answers to parts (a) and (b) to someone who has never had A course in statistics.
If the average low temperature of a winter month in Rochester, NY, is 16° and the standard deviation is 4.6 then according to Chebyshev's theorem, the percentage of average low temperatures in Rochester, NY, between 2.2° and 29.8° is %.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
The average price of a personal computer is 949 assuming that the prices are normally distributed with a standard deviation of 100 what is the price that corresponds to the least expensive 10%.
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