The events are independent if and only if . Under this condition, we have conditional probabilities
so the answer is D.
Answer:
-2 1
Step-by-step explanation:
Answer:ok
Step-by-step explanation:
Answer:
(0.1753 ; 0.2447)
Step-by-step explanation:
Using the relation :
Confidence interval :
p ± margin of error
p = 0.21
1 - p = 0.79
n = 530
Zcritical at 95% confidence level = 1.96
Margin of Error : Zcritical * sqrt[(p(1-p))/n]
1.96 * sqrt[(0.21(0.79))/530]
1.96 * 0.0176923 = 0.0346769
Margin of Error = 0.0346769
Lower boundary = 0.21 - 0.0347 = 0.1753
Upper boundary = 0.21 + 0.0347 = 0.2447
Confidence interval :
(0.1753 ; 0.2447)
42 mph I believe (: Happy to help.
(How to Find)
Find 5% of 40 which is 2. Add that to the 40 which equals 42.