A teacher wants to compare scores on a geology exam for two classes. The difference between the sample means is 21.4. If the standard
deviation of the distribution of the difference between sample means is 16.66, and she is testing the hypothesis at the 68% confidence level,
which statement is true?
A.
The difference between the two means is significant, so the null hypothesis must be accepted.
B. The difference between the two means is not significant, so the alternative hypothesis must be rejected.
C. The difference between the two means is not significant, so the null hypothesis must be rejected.
D. The difference between the two means is not significant, so the alternative hypothesis must be accepted.
E. The difference between the two means is significant, so the alternative hypothesis must be accepted.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

6.5

step-by-step explanation:

you said it was in the question

~courtney

they can both be solutions depends on the equation

step-by-step explanation:

what is the equation? ?

the number of possible outcomes that do not show a 1 on the first spinner and show the number 4 on the second spinner is 2.

spinner 1 spinner 2

1                     1

1                     2

1                     3

1                     4

2                   1

2                   2

2                   3

2                   4   = not 1, and 4

3                   1

3                   2

3                   3

3                   4 = not 1, and 4

only 2 outcomes have passed the given condition.

step-by-step explanation: