Chapter 1. Introduction to Tests of Significance: The Basics

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Stat Tutor
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Question 1

1:14

Question 1.1

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Incorrect. We test claims about the value of the parameter in a test of significance
Correct. We test claims about the value of the parameter in a test of significance
Incorrect. Try again.
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Questions 2-3

2:19

Question 1.2

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Incorrect. If the difference between the observed value of the statistic and the claimed value of the parameter is much larger than it should be due to chance, then we declare the difference to be statistically significant.
Correct. If the difference between the observed value of the statistic and the claimed value of the parameter is much larger than it should be due to chance, then we declare the difference to be statistically significant.
Incorrect. Try again.
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Question 1.3

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Incorrect.
Correct.
Incorrect. Try again.
2

Question 4

4:49

Question 1.4

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Incorrect. The judge declared the observed effect to be "statistically significant," meaning that the promotion rate for Hispanics was significantly lower than the overall FBI promotion rate.
Correct. The judge declared the observed effect to be "statistically significant," meaning that the promotion rate for Hispanics was significantly lower than the overall FBI promotion rate.
Incorrect. Try again.
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Question 5

6:05

Question 1.5

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Incorrect. The probability is 0.0002 which is very low.
Correct. The probability is 0.0002 which is very low.
Incorrect. Try again.
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Question 6

6:23

Question 1.6

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Incorrect. An observed effect that would rarely happen if a claim were true is good evidence that the claim is not true.
Correct. An observed effect that would rarely happen if a claim were true is good evidence that the claim is not true.
Incorrect. Try again.
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