If a 90% confidence interval for the difference of proportions contains some positive and some negative values, what can we conclude about the relationship between p1 and p2 at the 90% confidence level?
a. there is a negative difference between p1 and p2.
b. there is no difference between p1 and p2.
c. there is a positive difference between p1 and p2.
d. we cannot make a conclusion about the relationship between p1 and p2.

b. There is no difference between p1 and p2.

Step-by-step explanation:

Given that a 90% confidence interval for the difference of proportions contains some positive and some negative values

i.e. confidence interval lower bound is negative and upper bound is positive

This confirms that 0 is contained in the confidence interval for difference of proporitons at 90%

Hence for the hypotheses

we find that 0 is inside the confidence interval

This implies null hypothesis is accepted

Hence we conclude that there is no difference

b. There is no difference between p1 and p2.

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!