Please show all the work hand wriiten. 1. It is known that the probability of having a certain medical condition, Condition A, is 14% and the probability that a person has another condition, Condition B, is 22%. It has recently been learned that 6% of all people have both conditions at the same time. Use (show your work) the appropriate rule of probability to determine the probability a person has either Condition A or Condition B (or both). Note: Only half-credit if you fail to use the probability rule. 2. Suppose a pharmaceutical company develops a drug which helps children stop wetting the bed at night. They claim it has a success rate of 80%. You doubt this, thinking they have exaggerated the success rate. So you test this by giving the drug to a sample of 10 bed-wetting children, and only 7 of the 10 stop wetting the bed. What is the probability, under their claim, that seven or fewer will stop bed-wetting? 3. When fitting a linear regression line, the following sums of squares are found: SXX = 20.933 SXY = 18.641 SYY = 20.983 Use the above to calculate r2, the coefficient of determination. 4. How should you interpret an r-value (correlation coefficient) of r = +1.70 ?
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