Measures of location Quiz

1. A frequency table has $\sum fx=156$ and $\sum f=12$. What is the mean?

• A. $12$
• B. $13$
• C. $14$
• D. $156$

2. Find the median of 2, 5, 8, 9, 11, 20.

• A. $8$
• B. $9$
• C. $8.5$
• D. $9.17$

3. Data are coded as $y=\frac{x-40}{5}$ and $\bar y=3$. Find $\bar x$.

• A. $43$
• B. $40.6$
• C. $-25$
• D. $55$

4. Which measure of location is least affected by one very large value?

• A. The median
• B. The mean
• C. The sum
• D. The range

5. Classes 10 to under 20, 20 to under 30, 30 to under 40 have frequencies 6, 12, 12. Estimate the mean.

• A. $25$
• B. $27$
• C. $810$
• D. $35$