1.The computer giant IBM has 637,133 stockholders. A vice president plans to conduct a survey to study the numbers of shares held by individual stockholders. He interviewed 20 randomly selected stockholders in each of the 50 States.Identifythe type of sampling used when a sample is obtained as described.

simple random sampling

systematicsampling

convenience sampling

stratifiedsampling

2.In a research experiment, one group of physicians was given bottles of epinephrine labeled with a concentration of " 1 milligram in 1 milliliter solution" and another group of physicians was given bottles labeled with ration of " 1 milliliter of a 1:1000 solution". The two labels the exact same amount, and the physicians were instructed to administer 0.12 milligrams of epinephrine. The results were reported in The NY Times.

Correct Dosage Calculation

Wrong Dosage Calculation

Total

Concentration Label

11

3

Ratio Label

2

12

Total

Suppose one physician is randomly selected.Which statement isnottrue?

Physicians given Labels describes as rconcentration appear to have done worse

Physicians given Labels describes as ratio appear to have done worse

P(Physicians given bottles labeled with concentration gettingcorrectcalculation) = 11/14 = 0.857

P(Physicians given bottles labeled with ratio gettingwrongcalculation) = 12/14 = 0.857