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Patients who have artificial hip-replacement surgery experience pain the first day after surgery. Typically, the pain is measured on a subjective scale using values of 1 to 5. Let x represent the random variable, the pain score as determined by the patient. The probability distribution for x is believed to be as below. (Give your answers correct to two decimal places.) x 1 2 3 4 5 P(x) 0.07 0.13 0.21 0.15 0.44 (a) Find the mean of x. (b) Find the standard deviation of x.
in designing an experiment involving a treatment applied to 5 test subjects researchers plan to use a simple random
If two gloves are randomly selected from the box without replacement, what is the probability that both gloves selected will be right handed.
suppose that x1 x2 x3 x4 and x5 is a random sample from a distribution with density function fx 1theta for 0ltxlttheta.
Find the least-squares regression line to predict chirps per second based on temperature. increase in temperature. Predict the chirps per second if it is 83.3 degrees.
the probability that an individual egg in a carton of eggs is cracked is 0.03. you have picked out a carton of 1 dozen
what is the value of y when x 3 if the equation of the regression line is y 23.1 - 3.8x
question what is a type i error? explain how the cumulative type i error affects your decision making. how are the two
find the critical value from table l for the rank correlation coefficient given sample size n 9 and alpha
Workers in 2 different mine groups were asked what they considered to be the most important labour-management problem. In Group A,
a bank has just made 200 car loans. the banks records indicate that about 7 of their customers make late payments on
a study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 chevrolet cavalier shows that
a manager is trying to decide whether to buy one machine or two. if only one is purchased and demand proves to be
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