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the visual analog scale is often used to measure pain the worst possible score is 10 thirty patients who had the same
perform a wilcoxon rank sum test on the following data on the length of time that it took to perform two types of
for the observations21 36 42 24 25 36 35 49 32verify that the sample mean 20 trimmed mean and median are xmacr 3333
for the data in exercise what is the minimum number of observations that must be altered so that the 20 trimmed mean is
suppose health inspectors rate sanitation conditions at restaurants on a five-point scale where a 1 indicates poor
in the previous problem what is the winsorized variance if the value 49 is increased to 102in general will the
if the proportion of people with a certain illness who recover under a given treatment is actually 8 what percentage of
the proportion of 200 children age 19-35 months from families in poverty who had inadequate polio vaccinations was
one hundred patients are available to participate in an experiment to compare two cold remedies as in the example in
an experiment was performed to determine if a new educational program given by pharmacists could reduce the prescribing
in high schools a and b the proportion of teenagers smoking has been estimated to be 20 the same antismoking
in a study of weight loss two educational methods were tested to see if they resulted in the same weight loss among the
in a casecontrol study the investigators examined the medical records of the last 100 consecutive patients who had been
a matched sample casecontrol study was performed using cases and controls who have been matched on age and eye color
in a health survey adult respondents were asked if they had ever been assaulted by a domestic partner or spouse the
in a casecontrol study of patients with gallstones information on coffee consumption was obtainedamong the 80 controls
the following table is based on samples of patients diagnosed with gastric cancer peptic ulcer and controls from the
workers were classified as having no n 949 mild n 44 moderate n 13 or severe heart failure n 1researchers want to
in a public health survey in a rural county information was obtained on age and the question do you have one person you
the following rates are for all deaths from firearms per 100000 persons in the united states for the years 1985-1995
use the following data on length of service in days x and cost per day in dollars y for 10 patients on a home health
in given problem data are presented on counts of bacteria on 12 plates by two observers both observers counted the same
the following table contains data from 17 countries these countries are a systematic sample from twice this number of
the time taken for cessation of bleeding was recorded for a large number of persons whose fingers had been pricked the
make a 95 confidence interval for the mean of the cholesterol-level population using each of the samples gathered in