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Each individual in a sample of nursing home patients was cross-classified both with respect to cognitive state (normal or mild impairment, moderate impairment, severe impairment) and with respect to drug status (psychotropic drug change, psychotropic user without a change, no psychotropic medication). The following Minitab output resulted from a request to perform a chisquared analysis.
a. Verify the expected frequency and contribution to x2 in the normal-drug change cell of the two-way table.
b. Does there appear to be an association between cognitive state and drug status? State and test the appropriate hypotheses using a significance level of .01. [Note: The cited article reported a P-value.]
A bag of jelly belly candies contains the following colored jelly beans: red (10), blue (2), orange (5), brown (21), green (0), and yellow (18). Construct the probability distribution for x.
Let X be the number of gallons of ice cream that is requested at a certain store on a hot summer day. Assume that f(x)= 12x(1000-x)^2/10^12, 0
an urn contains nine white balls and 11 black balls. a ball is drawn and replaced. if the ball is white your opponent
you are rolling a 6-sided die but you dont know whether its fair or not. you know that that are only two kinds of dice
Entire commercial airline industry, consider a random sample of 200 flights. What is the expected number that will arrive on time? What is the standard deviation of this distribution.
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company rnadomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
Customers with Internet access, (b) between 97% and 99% of the customers with Internet access, and (c) fewer than 97% of the customers with Internet access?
A survey indicates that male employees were more likely than females to relocate without being promoted. What information would you want to know before you accepted the results of this survey?
if a random variable can take on a measurable infinite number of values such as a persons weight height or temperature
Find the probability that on any given day the daily power consumption will exceed 12 million kilowatt-hours.
How many "bars" would be involved if you were supposed to construct a bar graph to represent the frequency distribution of letters? What is the relative frequency of letter I?
The mean SAT verbal score is 478, with a standard deviation of 98. Use the Empirical Rule to determine what percent of the scores lie between 380 and 478. (Assume the data set has a bell-shaped distribution)
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