Question

Q1. If the individual have the disease the probability is .95 that the test gives positive diagnosis where if the individual does not have the disease the probability is 0.98 that the test gives negative diagnosis. Assume that 8% of tested people have the disease. Answer the following:

1. What is the sensitivity and the specificity of the test?
2. If an individual has diagnosed positive what is the probability that he actually has the disease?

Q2. for the BP measurements of 6 old males: 125 135 125 120 155 180 compute the   following

1. The mean, median and mode. Which one is the best?
2. the standard deviation
3. the skewness
4. the coefficient of variation
5. the 70^th percentile

Answer 1