00:01
Hey there, welcome to numerate.
00:03
So we are giving a set of values here, and we had to find a percentile rank for each test score.
00:09
Okay? so i've written down the equation here for percentile rank, where r equals the percentile rank equals the numbers of p will be the numbers equal to or less than the test score, divided by the total numbers of test score times 100.
00:29
Okay.
00:30
So let's do separated by seven.
00:35
So let's do seven.
00:37
Let's go in order.
00:39
Seven.
00:39
So how many values are equal less than to seven is going to be one seventh.
00:44
And it's going to be times 100.
00:48
So actually, let's actually do this.
00:54
Let's do r of seven equals.
00:59
So we know that it's seven.
01:00
Okay.
01:01
And then we're going to get a value.
01:03
Of around so of around um 14 14 .3 okay so that was for uh test score 7 let's do the next one for 12 so r of 12 equals so how many values less than what equals is 12 is 12 is 2 over 7 times 100 equals so let's see um what is that equal and that equals around um um 28 .6 okay, so for our next one we have 18 so let's try our of 18 for a percentile rank this would be three out of seven times 100 so this is the percentile rank and so we're gonna times and we're gonna get a value of 18 right can we get a value of around 42 .9.
02:28
Okay, and then we have a few more percentile rank of 25...