Answer:
The 80% confidence interval for difference between two means is (0.85, 1.55).
Step-by-step explanation:
The (1 - <em>α</em>) % confidence interval for difference between two means is:

Given:

Confidence level = 80%

*Use a <em>t</em>-table for the critical value.
Compute the 80% confidence interval for difference between two means as follows:

Thus, the 80% confidence interval for difference between two means is (0.85, 1.55).
It's D. the median for town A, 30, is less than the median for town B, 40.
Answer:
.25 dollars
Step-by-step explanation:
divide everything by 4 to get .25
SIN(x) = .7547
X = INVERSE-SIN(.7547)
X = 49.0 degrees