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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 particular company offers a 500$ deductible policy. If the company wishes its expected profit to be $100, what premium amount should it charge?
rolling a fair twelve-sided die produces a uniformly distributed set of numbers between 1 and 12 with a mean of 6.5 and
The business estimates the true population standard devuation is around $2,400.If yhe confidence level is 90%, find the required sample size in order to meet the desired accuracy.
The food distributor selects a sample of stores located in areas where he believes the shoppers are receptive to trying new products. What type of sampling does this represent?
Suppose that 45 percent of the population favors a certain candidate in an upcoming election. If a random sample of size 200 is chosen, find the expected value and standard deviation of the number of members of the sample that favor the candidate..
The number of breakdowns Y per day for a certain machine is a Poisson random variable with mean λ. The daily cost of repairing these breakdowns is given by C = 3Y 2. If Y1, Y2, . . . , Yn denote the observed number of breakdowns for n independentl..
suppose bolts are being manufactured using a process so that it is known that the length of the bolts follows a normal
Find the smallest possible premium for each, such that there is a probability of at least 0.95 that the total premiums will cover the total benefits on both contracts.
The use of linear regression is a critical tool for a manager's decision-making ability. Please carefully read the example below and try to answer the questions in terms of the problem context.
Based on this data, give a 95% confidence interval for the average MAO activity level of bulimic patients. Assume that the level of MAO activity is normally distributed.
Since Richard has not attended class recently, he doesn't know any of the answers. Assuming that Richard guesses on all ten questions, what is the probability he answers at least half correctly?
It could not do anything with the airport and suffer a loss of revenue. The current value of raised revenue from a new airport is in question.
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