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.
Answer:
51 people
Step-by-step explanation:
X=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3
Answer:
Step-by-step explanation:
Find the LCM of the denominators and then solve:
