25 WARNINGS OOPSSSSSSSSSS
1 answer:
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Answer:
Option d) 840
Step-by-step explanation:
Given that a test to measure psychotic tendencies was given to a group of 1,000 air force cadets who wished to work in nuclear silos.
If Score ≥64 would be eliminated.
X is N(52, 12)
Probability for any random person to get eliminated
=
Now coming to sample size of 1000 people, we find each person is independent of the other and there are two outcomes either >64 or < 64
So Y no of persons who get more than 64 is binomial with n =1000 and p = 0.1587
Mean of Y = E(Y)
= no of people who were not accepted
No of people accepted
Approximately we get 840 so option d
Answer:
Option C.
Step-by-step explanation:
Given information:
Male-Full stop = 6, Male-Rolling stop = 16, Male-No stop = 4
Female-Full stop = 6, Female-Rolling stop = 15, Female-No stop = 3
Using the given information we get
Total number of males = 6 + 16 + 4 = 26
Total number of males = 6 + 15 + 3 = 24
Probability of No stop is
We need to find the number of males that would we expect to not stop at all.
Expected number of males = Number of males × Probability
Expected number of males =
Expected number of males =
Therefore, the correct option is C.