Averages and spread Quiz

1. What is the mean of $5, 8, 8, 10, 14$?

• A. $9$
• B. $8$
• C. $10$
• D. $45$

2. What is the median of $3, 9, 5, 12, 7, 11$?

• A. $7$
• B. $8$
• C. $9$
• D. $7.5$

3. A set of house prices has one extremely high price. Which average best represents a typical price?

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

4. A grouped table has $2$ values in the class $0\leq x<10$, $6$ in $10\leq x<20$ and $2$ in $20\leq x<30$. What is the estimated mean?

• A. $10$
• B. $20$
• C. $5$
• D. $15$

5. Team A has mean $70$ and range $10$. Team B has mean $72$ and range $30$. Which comment is correct?

• A. Team B is more consistent because its mean is higher
• B. Team A is more consistent because its range is smaller
• C. Team B is more consistent because its range is larger
• D. Team A and team B are equally consistent