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A nursing student is studying how long it takes patients to receive pain relief from minor to moderate headache from two different pain relievers. Subjects are randomly and independently assigned to two groups where one is giving the leading product and the other given a new drug about to be released. Subjects then record the time it takes to realize relief from pain. Is there evidence to suggest the new drug works faster than the old?
Current 6.3 12.1 8.4 15.2 11.0 13.6 9.4 12.6 12.0 11.5 13.2 11.7 15.0 14.5
New 6.3 11.4 15.5 14.0 10.6 7.5 8.2 3.1 6.8 12.0 5.5 11.0 9.6 4.4
a pharmaceutical company receives large shipments of ibuprofen tablets and uses this acceptance sampling plan randomly
Compute the z score for the data company. Considering the altman model, comment on the likelihood that this firm will experience financial failures.
Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
let y1 y2 ... yn be independent random variables such that each yi has an exponential distribution with mean bi. let
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers: 0.0965,0.5692,0.6658
1. let x equal the number of alpha particles counted by a geiger counter during 30 seconds. assume that the
Compute a 95% confidence interval for the population mean, based on the sample 32, 38, 31, 34, 35, 32, and 36. Change the number from 36 to 14 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme..
items produced by a manufacturing process are supposed to weigh 90 grams. the manufacturing process however is such
question 1 a psychologist has to develop a new test of spatial perception and she wants to estimate the mean score
Should we thus conclude that verbal praise tends to lower performance levels, whereas verbal criticism tends to raise them? Or is some other explanation possible?
The following table shows the hardness (in Brinell hardness numbers) and the tensile strength (in thousands of pounds per square inch) of ten specimens of a certain alloy.
The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
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