Mathematics

Statistics

Grade 8 · Middle School

Answer every question first, then press Finish to see your score and explanations.

Question 1 of 20Easy
The mean of the data $6, 7, 8, 9, 10$ is ...
Question 2 of 20Easy
The median of the data $3, 5, 7, 9, 11$ is ...
Question 3 of 20Easy
The mode of the data $2, 3, 3, 4, 3, 5$ is ...
Question 4 of 20Easy
The range of the data $12, 7, 15, 9, 20$ is ...
Question 5 of 20Easy
The mean of the data $4, 6, 8$ is ...
Question 6 of 20Easy
The median of the data $4, 1, 3, 2, 5$ is ...
Question 7 of 20Medium
The mean of the data $5, 7, 8, 10$ is ...
Question 8 of 20Medium
The median of the data $6, 8, 5, 9, 7, 10$ is ...
Question 9 of 20Medium
The mean of four numbers is 7. If three of them are 6, 8, and 5, the fourth number is ...
Question 10 of 20Medium
The mode of the data $4, 5, 4, 6, 4, 7, 5$ is ...
Question 11 of 20Medium
The range of the data $25, 18, 30, 21, 27$ is ...
Question 12 of 20Medium
The mean of the data $10, 12, 14, 16, 18$ is ...
Question 13 of 20Medium
The median of the data $20, 25, 15, 30, 10, 35$ is ...
Question 14 of 20Medium
The data $4, 7, 8, x, 12, 15, 18$ has median 10. The value of $x$ is ...
Question 15 of 20Hard
The mean of five numbers is 12. After one number is added, the mean becomes 13. The added number is ...
Question 16 of 20Hard
The mean of the data $12, 15, 18, x, 20$ is 17. The value of $x$ is ...
Question 17 of 20Hard
The first quartile $(Q_{1})$ of the data $2, 4, 4, 5, 6, 7, 8, 9, 10, 12$ is ...
Question 18 of 20Hard
The mean score of five students is 78. After one score is removed, the mean of four students becomes 80. The removed score is ...
Question 19 of 20Hard
The difference between the median and the mean of the data $9, 5, 7, 3, 11, 6, 8$ is ...
Question 20 of 20Hard
The mean of eight numbers is 15. If each number is decreased by 3, the new mean is ...

0/20 answered