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Patients in a critical care unit, who are matched on age, receive either experimental oral care or control oral care. Which test would be most appropriate to answer the following research question: Does the type of oral care received by the patients have any effect on their length of stay in the critical care unit? There were 36 pairs of patients, and their length of stay was not normally distributed.
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
question a national survey claims that people buy music compact disks in equal percentages for the following five age
Given 5,000 light bulbs from an outside supplier. If past performance data indicates that these have been 3% defective, and a random sample of 40 parts are drawn from the shipment what is the probability that you will find more than 2 defective pa..
An individual is considered to have the dominant characteristic if the person has the AA or Aa genetic trait. If we were to choose an individual from this city at random, what is the probability that this person has the dominant characteristic?
a study looked at the relationship between condom use and the spread of aids by following heterosexual couples in which
the breaking strength of threads has a standard deviation of 18 grams. how many measures on breaking strength should be
Use normal disrtibution of fish lengths for which the mean is 8 inches and the standard deviation is 5 inches. Assume the variable x is normally distributed.
A fair die is rolled twice, with outcomes X for the first roll and Y for the second roll. Find the moment generating function MX+Y (t) of X + Y.
A two-way ANOVA compares two exercise programs (A and B) and two exercise frequencies (twice a week and four times a week). The response variable is weight lost after 8 weeks of exercise. An interaction is present in the data when
To the greatest number of decimal places in the printout, what is the least-squares regression line?- What proportion of the variation in rolling resistance is explained by the regression line?
predicting winning percentage for the nflthe national football league nfl records a variety of performance data for
A researcher claims the proportion of auto accidents that involve teenage drivers is less than20%. ABC Insurance Company checks police records on 200 randomly selected autoaccidents and notes that teenagers were at the wheel in 32 of them.Assume t..
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