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D
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Quote:

it should be D, right?
No, C is correct, we need to find which number if added will have negligible effect on SD, SD is basically deviation from Mean, We have SD as 5, if 20 is added then variance will be 0 and denominator will increase by 1, however if 15 will be added, the variance will be same as earlier set because difference between Mean and element will be 5 only, and even though the denominator increase by 1, variance will still be same.
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Hi Everyone I am looking for a study partner who is in the I initial stage of prepration!
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There is simple rule for this, what will happen if the new element is added, lets say new element is Y and Mean is M and SD is S, if Absolute difference of Y and M is greater than S, then New SD S1 >S, If if Absolute difference of Y and M is less than S, then S1<S, but if if Absolute difference of Y and M is equal to S, then S1=S
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Quote:

No, C is correct, we need to find which number if added will have negligible effect on SD, SD is basically deviation from Mean, We have SD as 5, if 20 is added then variance will be 0 and denominator will increase by 1, however if 15 will be added, the variance will be same as earlier set because difference between Mean and element will be 5 only, and even though the denominator increase by 1, variance will still be same.
Oh riiight. Thanks 🙏
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Hi Everyone I am looking for a study partner who is in the I initial stage of prepration!
I’m up
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*Kirtimishra19 writes:*
> Hi Everyone I am looking for a study partner who is in the I initial stage of prepration!
I’m up
Add me in
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*ShivaniSoni99 writes:*
Hi Everyone I am looking for a study partner who is in the I initial stage of prepration!
Hello..likewise
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If you guys are seriously in, i can create a group
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Yes pls
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Quote:

*Kirtimishra19 writes:*
> Hi Everyone I am looking for a study partner who is in the I initial stage of prepration!
I’m up
I'm up
Please add me in too

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*pointdexter writes:*
If you guys are seriously in, i can create a group
Yes please
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springjuly

it should be D, right?
No.
C is right because it asks for least effect on SD.

When mean is 20 and SD is 5, it means that 15 or 25 is the average deviation.

Hence value like 15 has least effect (since SD here is 5 too for just this one isolated case)

hope it helps!
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If you guys are seriously in, i can create a group
On WhatsApp?
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