1. Two groups of diabetic patients were randomly selected. One group included 50 females and the second group 50 males. All 100 subjects administered the same oral anti-diabetic drug for a month. The drug’s efficiency on controlling the disease was measured using a recovery scale: full recovery, partial recovery, and no recovery. (1)The statistical tests used to measure the relationship between gender and the efficiency of the drug is: (a) Chi-square test (b) Independent t- test (c) Dependent t- test (d) Z-test (e) None of the above (2) According to your answer for the above question, the degree of freedom would be: a. 98 b. 49 c.2 d. 6 e. 3

2. (3) The diastolic blood pressures (DBP) of a group of young men are normally distributed with mean 70 mmHg and a standard deviation of 10 mmHg. 95% of the men will have DBP between: a.50 mmHg and 90 mmHg b. 60 mmHg and 80 mmHg c.40 mmHg and 70 mmHg d.80 mmHg and 100 mmHg e. 65 mmHg and 75 mmHg

3. (4) If a population’s resting heart rate is normally distributed with a mean of 70 beats/min and standard deviation of 10, what proportion of people who are selected at random will have heart rate of less than or equal to 90 beats/min? a. 50.00% b. 4.13% c. 97.72% d. 01.83% e. 2.82%

4. (5) Answer the following as TRUE OR FALSE The p-value: a.Is the probability that the null hypothesis is false. b.Is large for small studies. c.Is the probability of the observed result, or one more extreme, if the null hypothesis were true. d.Is one minus the type-II error. e.Can only take a limited number of values such as 0.1, 0.05, 0.01 etc.

5. A physician wants to know whether the proportion of esophageal cancer diagnosed as multiple primary tumors (MPT) differs between females and males. He selected a random sample of 100 cases of esophageal cancer, 60 were males and 40 were females. Of the 60 male esophageal cancer patients, 40 were diagnosed as MPT. Of the 40 female esophageal cancer patients, 10 were diagnosed as MPT.