Stats- Poisson + HT

Question 1

P:
Why is a binomial distribution suitable?

Answer 1

1. fixed no. of trials
2. outcomes are independent
3. fixed probability of success
4. 2 outcomes- success and failure

Question 2

P:
Why is poisson distribution a suitable model?

Answer 2

1. events occur singly in time
2. independent
3. occur at a constant rate

Question 3

DRV:
Give the name of the distribution with
a discrete random variable, each of its values is assumed to be equally likely.

Answer 3

Discrete uniform distribution

Question 4

HT:
What is a hypothesis test?

Answer 4

• where the value of a population parameter is tested against what value it takes if H0 is rejected
• theory, methods & practice of testing a hypothesis by comparing it w/ H0

Question 5

HT:
What is a critical value?

Answer 5

• 1st value inside CR

Question 6

HT:
What is an acceptance region?

Answer 6

• region to accept H0

Question 7

What is a critical regoin?

Answer 7

A range of values of a test statistic that would lead to rejection of H0.

Question 8

What is the expected value of a binomial distribution?

Answer 8

E(X) = np

Question 9

What is the variance of a binomial distribution?

Answer 9

Var(X) = npq = np(1-p)