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An observational study is conducted to investigate the association between age and total serum cholesterol. The correlation is estimated at r=0.35. The study involves n=125 participants and the mean (std dev) age is 44.3 (10.0) years with an age range of 35-55 years, and mean (std dev) total cholesterol is 202.8 (38.4). The regression equation is below: Y= 143.4+1.34x
Estimate the total serum cholesterol for a 50 year old person.
A medical social researcher wishes to investigate the proportion of Type II diabetic patients in a given country town who take insulin to manage their diabetes. A random sample of 120 Type II diabetes patients across the medical practices in the t..
The distribution of sample mean for samples of 500 homes is normal with a mean of 2.64 and a standard deviation of 0.06. Suppose you select a random sample of n=500 homes and determine that the mean number of people per home for this sample id 2.5..
Let X1 ,X2 be a random sample of size 2 from a distribution with positive variance and m.g.f. M( t). If Y = X1 + Xi and Z X1 ·- X2 are independent, prove that the distribution from which the sample i..
Suppose a defective part was detected at the inspection station. What is the probability that this defective part is due to human error?
a random sample of 10 parking meters in a beach community showed the following incomes for a day. assume the incomes
How do we go about interpreting the results of various types of statistical tests in health care research?
What are the differences between reference groups and referent systems?
A standard normal distribution
Customers bought 5 times as many boxes of light bulbs as switch plates. How many of each did Light Bright Warehouse sell?
suppose that in elections a candidate says that hell get 60 of the votes in the election. the total population is 300
in a premlinary test of the microsort method of gender selection 14 couples were treated and 1.3 of them had baby
When the accountants for lose-a-digit Computer, Inc. had finished preparing their annual budget, they presented the final figures to the president, I.M. Smart.
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