Hypothesis Testing and Analysis Quiz

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Question 1

What is H₀ in hypothesis testing?

a) Null hypothesis b) Alternative hypothesis c) Test statistic d) P-value

Question 2

If p-value < α, what do you do?

a) Reject H₀ b) Accept H₀ c) Fail to reject H₀ d) Recalculate

Question 3

What does α (alpha) represent?

a) Significance level b) Test statistic c) P-value d) Sample size

Question 4

A Type I error occurs when you:

a) Reject true H₀ b) Accept false H₀ c) Accept true H₀ d) Reject false H₀

Question 5

What does a correlation coefficient of -0.8 indicate?

a) Strong negative correlation b) Weak negative correlation c) Strong positive correlation d) No correlation

Question 6

What does R² measure in regression?

a) Proportion of variance explained b) Correlation coefficient c) Test statistic d) P-value

Question 7

If α = 0.05, what is the confidence level?

a) 95% b) 5% c) 0.05% d) 50%

Question 8

What values can a correlation coefficient take?

a) -1 to +1 b) 0 to 1 c) -∞ to +∞ d) 0 to 100

Question 9

In a two-tailed test with α = 0.05, the critical z-values are approximately:

a) ±1.96 b) ±2.58 c) ±1.64 d) ±2.33

Question 10

What does it mean if correlation does not imply causation?

a) Variables may be related but one doesn't cause the other b) Variables are not related c) Variables always cause each other d) Correlation is always wrong

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