Question

Carlos is analyzing the results of an experiment in which he is comparing the difference in weight gain by experimental mice after feeding them two different foods for one month. The difference in the mean weight gain is 0.6 grams. He has calculated the standard deviation of the difference in sample means as 0.305. What is the 68% confidence interval for the population mean difference?

Answer 1

A. between -0.6 and +0.6

B. between -1.2 and +1.2

C. between -0.305 and +0.305

D. between -0.610 and +0.610

Answer 2

@Daniee_Bruhh @Mehek14 @Preetha

Answer 3

@Directrix

Answer 4

@AloneS

Answer 5

Geez chris hun here look here https://www.google.com/search?q=The+difference+in+the+mean+weight+gain+is+0.6+grams.+He+has+calculated+the+standard+deviation+of+the+difference+in+sample+means+as+0.305.+What+is+the+&ie=utf-8&oe=utf-8

Answer 6

There is a 68% chance that our difference in mean weight 0.6 is
within Zcritical*standard deviation. So we need to find zcritical for 68% .
Using a calculator I find that Zc = 0.9944578 or using empirical rule about 1.
There is a 68% chance that our difference in mean weight 0.6 is within 1* 0.305.
0.6 - .305 < mean < 0.6 + .305

Answer 7

None of the choices match the work I am doing though.
The interval should be approximately between 0.3 and .9

Answer 8

So I would go with B

Answer 9

I have chosen that one before but its incorrect

Answer 10

@Ineedhelplz

Answer 11

Really?

Answer 12

hmm :/

Answer 13

Yeah really