MATH 2233 Lecture Notes - Lecture 22: Random Variable, Standard Deviation, Blood Pressure
7 Dec 2018
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To answer this question we must complete the following tables. Remember, by independence p(x1 = a and x2 = b) = p(x1 = a) p(x2 = b) or p(a, b) = p(a) p(b) I random variable whose mean variance and s. cl are related to the pop mean , variance and sd respectively . For any random sample with a large , the sample mean has an approximately normal distribution. I is exactly normally for any sample since . Example: the population of white males aged 35-44 in canada has a mean systolic blood pressure of. 130 mmhg with a standard deviation of 8 mmhg. Suppose that a random sample of 50 white males is selected. Find the probability that (a) the sample mean systolic blood pressure is below 133 mmhg. 0. 9960 (b) the sample total is above 6400 mmhg. Pit ) 6400 ) =p ( i 7128 ) =
