The histogram shows the distribution of the scores on a...

The histogram shows the distribution of the scores on a statistics exam in a large class of 70 students. Frequency 7 7 10 8 12 17 9 48 56 64 72 80 88 96 104 Quiz scores A. The median and mean are both between 72 and 80. B. The median is between 80 and 88, and the mean is between 72 and 80. C. The median and the mean are both between 88 and 96. D. The median is between 88 and 96, and the mean is between 80 and 88.

Transcript

00:01 Hello students we are going to write here for this this is the information regarding a histogram we are going to write here for this and this must be our table we need to write here for this this is so basically if i write here this will be written as so we are going to distribute these so basically this is scores then we will we need to write here this must be frequency and this is mid value and this is cumulative frequency.

00:39 So basically if i write here for this, this must be written as scores.

00:46 So let's erase this to make it more clear.

00:51 That is frequency.

00:55 F so let's erase this to make it more clear.

01:00 We need to write here for this.

01:08 So we are going to write here.

01:10 This is our mid value m and we need to write here this is cf cumulative frequency.

01:19 So let's erase this to make it more clear.

01:23 And this must be f of m, ffm.

01:27 So we are going to partition this to make it more clear so basically if i write here for this the first case this is second case now this is third case 64 to 72 then this is 70 to 80 we need to write here then 80 to 88 now we need to write here for this then 88 to 76 then 96 to 106 and we are going to partition this so if i write here for this this is 48 to 506 if i write here then 56 to 64 then 64 to 72 we need to write here for this.

02:12 This must be 72 to 80 and we need to write here 80.

02:20 So let's erase this to make it more clear.

02:25 If i write here for this then 88 to 96 and then 96 to 96 to 96 to 106.

02:34 So what would be our frequency? this is 7, then 7, then 10, then we need to write here 8, 10, then 12, then we need to write here 17, then 19.

02:45 So what would be our summation of f? this must be, this must be written as 70.

02:52 So mid value is 52, then 58, sorry, 50.

02:57 We need to write here, this is mid value as 52, then 60.

03:02 Then if i write here for this then 68 and if i write here then 76 then we need to write here for this then 84 then we need to write here 92 this must be 100 so basically this is our mid value now what would be our cumulative frequency this is 7 and 7 7 14 this must be added then 24 then we need to write here 32 then 44 then we need to write here for this.

03:33 This is 61.

03:35 61 plus 9.

03:37 That must be written as 61 plus 9 is 70.

03:42 So f multiplied by m is 364.

03:46 And we need to write here 4 to 0.

03:50 And this is 680...

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