00:01
In this exercise, we are asked to select which of five statements are correct regarding graphs a and b.
00:09
So a and b both show some distribution.
00:12
The first statement says that the mode of a is equal to the median of a, which is equal to the mean of a.
00:40
This is true if a is symmetrical about its mean, and the mode is also in the center of the distribution.
00:48
Distribution.
00:50
So a looks very much like it's symmetrical about zero, so therefore zero would be its mean.
00:58
Zero is also the highest point of the distribution's curve, which tells us that zero is also the mode, and for any symmetrical distribution, the median is equal to the mean.
01:13
So this statement is correct.
01:17
The second statement says the mode of b is greater than the median of b, which in turn is greater than the mean of b.
01:32
Now b, similar to a, looks like it's a symmetrical distribution.
01:37
It looks like there's some mean around here, which is also the mode and the median.
01:43
We don't see any skew in b...