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We want to be 95% confident in our findings and have a df of 5, what would our critical boundaries be if we were conducting a t test?
In the text, a correlation matrix was described. Using your own words, ex- plain what is meant by a correlation matrix. What values appear along the diagonal of a correlation? How do we account for these values?
What was the average number of hospitalized days for this group-correct to one decimal place and what was the daily average-correct to one decimal place - What was the average number performed monthly-correct to the nearest whole number?
A shop manual gives 6.5 hours as the average time required to perform a 30,000 mile major maintenance service on a Porsche 911. Last month a mechanic performed 11 such services, and his required times were as follows.
56% are enrolled in school. If a sample of 500 such children is randomly selected, find the probability that at least 250 will be enrolled in school.
the pulse rates for 13 adult women were as follows. construct a 0.95 confidence interval for the mean pulse rate. give
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02.
If, for a particular junction, the acceptor concentration is 1017/cm3 and the donor concentration is1016/cm3, find the junction built-in voltage. Assume ni = 1.5×1010/cm3.
What are the differences between probability distribution functions and probability density functions? Why do we care?
Plot the sample ranges on the R-chart. Analyze the pattern of the R-chart. Based on R-chart findings, is the process under statistical control? Explain and justify your answer
What is the probability the measure makes a correct diagnosis. (think about what constitute a correct diagnosis, so not detecting something when there's nothing there would count as well)
Smokers don't live as long (on the average) as nonsmokers, and heavy smokers don't live as long as light smokers. You regress the age at death of a group of male smokers on the number of packs per day they smoked. The slope of your regression line
the diameter of a shaft is normally distributed with mean 0.2508 inch and standard deviation of 0.0008 inch. the
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