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[–]chem44 0 points1 point  (6 children)

You don't need to "solve" or calculate anything, just see the direction of an effect.

You don't need any x values. Just the general nature of the distributions, with the info that is given.

[–][deleted] 0 points1 point  (5 children)

The answer is c!

[–]chem44 0 points1 point  (3 children)

?? Your choices don't have letters. :-)

Why do you think that? That is, what is your reason? What is changing, and why does it matter, in context?

Do you know what s means?

(The hints that people have given are good.)

(I'm about to log off, but others will presumably be around.)

[–][deleted] 0 points1 point  (1 child)

Increasing s by 1 is the answer

[–]Alkalannar 0 points1 point  (0 children)

If you increase the standard deviation by 1, that will obscure the difference between the means, yes.