00:01
Hey there, welcome to numerade.
00:03
So we are asked to find the mean median in mode of this frequency distribution data given here measuring the frequency of sales of athletic shoes at an outlet mall.
00:15
So measuring it from the past 30 days.
00:20
So let's calculate the mean first.
00:22
Our equation for the mean is denoted as x bar.
00:26
So we have x bar equals.
00:32
Equals the sum of x multiplied by our frequency, divided by the sum of our frequency.
00:57
So basically what you do here is to find x, which is the midpoint here.
01:04
So let's say we have our two values, 18 and 14.
01:08
So the middle value between 18 and 14 would be 16.
01:14
So therefore we're going to take 16 and add it.
01:19
I mean sorry 16 and multiply it to our frequency, which is 5.
01:25
And we do the same for the other ones.
01:28
So we have 19 and 23.
01:30
So that will be equal 22 times 9.
01:36
That's our frequency.
01:38
Plus.
01:40
So we have 25, 27, 26 times 6 plus.
01:48
This is our last one here plus 30 to 31 times 10 this entire sum here is going to be divided by the sum of the frequencies.
02:06
Okay, so our sum of frequencies will equals 30.
02:11
We have 30 sample size.
02:13
So let's see what this equals here.
02:14
16 times 5 plus 22 times 9 plus 26 times 6 plus 31 times 10 divided by 30 this will give us a value of around let's see here that's where x bar here the mean equals okay so it will equal um 24 .5 and let me fix this value here this should be 21 but our answers should still be 24 .5 for our mean and now for our median okay so this is how you to note median.
03:08
So the median is basically the number of observation, right? so we have basically the equation of n divided by 2 and term...