Question

Pls help with this problem

Answer 1

Option D is not true

Explanation:

The mode is the highest occuring number.From the data.

The mode is 9 and is greater than 7.This mean option A is correct.

The range is the difference between the highest number and the lowest which is 15-4 =11.Hence option C is correct because the range is more than 10.

The median when the data is arranged in either ascending or descending order i.e (15,12,11,9,9,7,5,4).Hence,the middle numbers are 9 and 9.To get the median,we get the average of the numbers which will be 9+9=18 ÷2= 9. The median is 9 which means option D is not correct.

The mean will be the addition of the numbers divided by the number of items

`(9 + 15 + 5 + 7 + 9 + 12 + 11 + 4)/(8)`

`= (72)/(8)`

`= 9`

The mean is equal to 9 which means Option B is correct.

This implies that the only option which is incorrect is option D

Answer 2

D

Explanation:

The median is 8, so it is less than 9.