0.666667 as a fraction is 2/3
(4,-3) does not pass through the graph
If you put (4, -3) into the equation you get 18
If you put (4/3, -1) into the equation you get 6
If you put (-2, -6) into the equation you get 6
No, in order for the lines to be parallel, the slopes have to be the same, it does not matter what the slopes are as long as they are the same slope. The lines could still be parallel if the slopes are negative.
We are given with
x1 = 20 min
s1 = 2 min
x2 = 30 min
s2 = 4 min
p = 0.9
Condition (x > 25)
We need to get the t-value between the two means and comparing it wit the t-value for the time of 25 minutes given that there is a 90% probability that the weather will be good. Simply use the t-test formula and use the t-test table to get the probability.
