Stats And Mechanics

Question 1

mutually exclusive events

Answer 1

P(A or B) = P(A) + P(B)

Question 2

Independent events

Answer 2

P(A and B) = P(A) x P(B)

Question 3

acceleration

Answer 3

a= (v-u)/t

Question 4

velocity

Answer 4

vv = uu + 2as
v = u + at

Question 5

displacement

Answer 5

s = (u+v/2)t
s = ut + 1/2att

Question 6

P(A or B or both)

Answer 6

P(A) + P(B) - P(A and B)

Question 7

You can model X with a binomial distribution, B(n,p) if:

Answer 7

• there are a fixed number of trials, n
• there are two possible outcomes (success and failure)
• there is a fixed probability of success, p
• the trials are independent of each other

Question 8

What is a critical region?

Answer 8

A critical region is a region of the probability distribution which, if the test statistic falls within it, would cause you to reject the null hypothesis.

Question 9

What is the actual significance level?

Answer 9

The actual significance level of a hypothesis test is the probability of incorrectly rejecting the null hypothesis.