10 items only

1. If the five numbers (3, 4, 7, x, y) have a mean of 5 and a standard deviation of square root of 2, find the values of x and y respectively given that y > x.*

• (6, 5)
• (6, 4)
• (5, 4)
• (5, 6)

2. What will happen to the mean if each observation is increased to half the value of the mean?*

• The mean will double
• The mean will be the median
• The mean will decrease by half its value
• The mean will increase to half its value

3. Which of the following would be affected the most if there is an extremely large value in the data set?*

• Mode
• Frequency
• Median
• Mean

4. Which of the following is not a data collection method?*

• Experimentation
• Watching TV
• Observation
• Questionnaire

5. It is the process of selecting a sample from a large group based on the principle of chance.*

• Non-probability Sampling
• Sampling
• Probability Sampling
• Simple Random Sampling

6. Referring to the data set below, what is the range of the data set?*

4.00 1.47 2.06 2.36 3.74 3.43 3.78