1. The average and standard deviation of the following numbers: 2, 4, 10, 12, 1.6, 6.4 are

6.0, 4.0857

6.0, 4.2783

7.2, 4.0857

7.2, 4.4757

2.  The average of 7 numbers is given 12.6. If 6 of the numbers are 5, 7, 9, 12,17 and 10, the remaining number is

-47.9

-47.4

 15.6

28.2

3. The average and standard deviation of 7 numbers is given a 8.142 and 5.005, respectively.  If 5 numbers are 5, 7, 9, 12 and 17, the other two numbers are

-0.1738, 7.175

3.396, 12.890

3.500, 3.500

4.488, 2.512

4. The sum of the square of the difference between data point and its average for the data 2, 5, 10, 12, 2.5, 6.7 is

4.023

13.49

16.19

80.93

5.  Two medications are tried to heal esophageal ulcers in patients. The time to heal is reported as the time the patient reports 1 or less heartburn episode per week.                              

            The medication with less recovery time with standard deviation and mean is

Pacalo,

Reggon,

Pacalo,

Pacalo,

6. A very large number of data points are chosen on a function  from x=0.2 to 2.1.  The average of these y values most nearly is

51.5

78.2

97.8

102

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