EPT21. A researcher believes a new diet should improve weight gain in laboratory mice. If ten control mice on the old diet gain an average of 4 ounces with a sample standard deviation of 0.3 ounces, while the average gain for ten mice on the new diet is 4.8 ounces with a sample standard deviation of 0.2 ounces, what is the p-value? (Use unpooled procedure.)
A. Below .01
B. Between .01 and .025
C. Between .025 and .05
D. Between .05 and .10
E. Over .10
For number 21, these are my given
n1 = 10
x1 = 4
s1 = 0.3
n2 = 10
x2 = 4.8
s2 = 0.2
I then go to 2-Sample T-Test on my calculator, plug my data.
Here is my question, when is the u (the mean sign) > 0 , < 0 or not equal to 0?
When I calculate, I get some weird p-value. The same for #22.
=/ PLEASE HELP!
22. Six capsules of drug A took an average of 75 seconds with a sample standard deviation of 1.4 seconds to dissolve, while the average time for six capsules of drug B was 71 seconds with a sample standard deviation of 1.7 seconds. Establish a 99% confidence interval estimate for the difference in dissolving time between the two brands(assuming we have normal distributions with equal variances.)
A. 4 ± 1.55
B. 4 ± 2.48
C. 4 ± 2.56
D. 4 ± 2.85
E. 4 ± 3.10
