Unit 8 Quiz: Review questions

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Unit 8 Quiz: Review questions

Can you explain your answer? Use your fingers to indicate your answer: 1=A, 2=B, 3=C, 4=D. After viewing the question, show me your answer in 15 seconds. Next, turn to your neighbor and you have one minute to convince him/her that you are right.

Which of the following statement about hypothesis testing is true? The goal of hypothesis testing is to prove or disprove a theory. When we employ a standard hypothesis test, we can find out how likely the hypothesis is true given the data in the long run. Hypothesis testing tells us whether the data and the theory fit each other All of the above

Group A received a new anti-aging drug while Group B was the control group. Roberts wants to know whether use of the new anti-aging drug can reduce the number of wrinkles on the face. Which of the following null hypothesis is NOT correctly written: There is no significant difference between Group A and Group B in the number of wrinkles on the face. There is no significant relationship between Group A and Group B in the in the number of wrinkles on the face. There is no significant relationship between use of the new anti-aging drug and the number of wrinkles on the face. The new anti-aging drug has no significant effect on the number of wrinkles on the face.

What is Type I error? The null hypothesis is rejected when the null is false. The null hypothesis is rejected when the null is true. The alternate hypothesis is rejected when the alternate is false. The alternate hypothesis is rejected when the alternate is true.

What is Type II error? The null hypothesis is rejected when the null is false. The null hypothesis is rejected when the null is true. The alternate hypothesis is rejected when the alternate is false. The alternate hypothesis is rejected when the alternate is true.

The notion of presumed innocent until proven guilty suggests that we should side with ______ the null hypothesis The alternate hypothesis

The pre-cautionary principle suggests that we should side with ______ the null hypothesis The alternate hypothesis

According to some scientists, extraordinary claims require extraordinary evidence. Therefore, our default position should be ______ the null hypothesis The alternate hypothesis