PUBPOL 2101 Revision

Question 1

If you fail to reject the Null hypothesis at the 5% and 1% significance level, but reject at the 10% level, the test is

Accepted Answer

Weakly significant

Question 2

The income distribution is skewed. A random sample of 50 is drawn and sample mean is computed. It is

Accepted Answer

Approximately normal

Question 3

The probability of rejecting the null when it is false is called

Accepted Answer

Power

Question 4

Point estimate \pm margin of error is called

Accepted Answer

interval estimate

Question 5

Test statistic X \simN(0,1). Test statistic value = 2. Find the p-value for an upper-tailed test

Accepted Answer

0.02275

Question 6

An estimator is a random variable due to randomness in selecting the sample, while an estimate is a non-random number

Accepted Answer

True

Question 7

The Bernoulli distribution is a special case of the Binomial distribution with only 1 trial

Accepted Answer

True

Question 8

If the correlation between variables X and Y is zero, it implies X and Y are independent

Accepted Answer

False

Question 9

Numerical summaries on the unemployment rate published by the government from 2000 to 2023 are classified as

Accepted Answer

Longitudinal, official statistics

Question 10

Estimators P and Q are unbiased and Var(P) < Var(Q). Which of the following are true?

Accepted Answer

P is an efficient estimator

Question 11

X \simU(3,5) Find E(X)

Accepted Answer

4

Question 12

Association refers to the relationship between 2 measurable variables

Accepted Answer

False

Question 13

If A and B are independent, then \left(P\left(A\right|B\right)=

Accepted Answer

P(A)

Question 14

Z \simN(0,1) Find P(Z < 0.5)

Accepted Answer

0.6915

Question 15

Goodness-of-fit tests are

Accepted Answer

Upper tailed tests

Questions 15