Question 1. 1. In a research study, t obt = 8.387 and t crit = 3.234. Which of t
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Question 1.1. In a research study, tobt = 8.387 and tcrit = 3.234. Which of the following is true? (Points : 20) We fail to reject the null hypothesis.We reject the null hypothesis.
We re-evaluate the null hypothesis using hypothesis testing
We prove the null hypothesis to be true. Question 2.2. The hypothesis "The consumption of alcohol will increase the amount of time it takes laboratory rats to complete a task" is ________. (Points : 20) two-tailed
false
one-tailed
not a valid hypothesis Question 3.3. Failing to reject the null hypothesis when it should have been rejected is an example of a ________. (Points : 20) Type III error
Type II error
Type IV error
Type I error Question 4.4. If the difference is predicted but the direction is not specified, the hypothesis is ________. (Points : 20) one-tailed
the null
null and void
two-tailed Question 5.5. When we fail to reject the null hypothesis, which of the following is true? (Points : 20) group differences are due to chance, not to the conditions of the experiment
group differences are due to the conditions of the experiment
group differences are due to both the conditions of the experiment and to chance
group differences are due to neither the conditions of the experiment or to chance Question 1.1. In a research study, tobt = 8.387 and tcrit = 3.234. Which of the following is true? (Points : 20) We fail to reject the null hypothesis.
We reject the null hypothesis.
We re-evaluate the null hypothesis using hypothesis testing
We prove the null hypothesis to be true.
Explanation / Answer
Que 1.1 Ans:- We reject the null hypothesis.
Reason:- Since t calucalted(obtained) is much larger than t critical, i.e, obtained values falls in the critical region. Hence we reject the null hypothesis.
Que 2.2 Ans:- one tailed
Reason:- because we are going to check either it increase the amount of time or not. It could be two tailed if we got to check whether it increase or decrease the time taken by the laboratory rats.
Que 3.3. Ans:- Type II error
reason:- because type II error is the probability of accepting null hypothesis when it is false.
Que4.4- Ans:- two tailed
Reason:- Here, we don't have a particular direction. It could be less or more. Hence we can say that it is a two tailed test.
Que 5.5 Ans:- group differences are due to neither the conditions of the experiment nor to chance.
Reason:- When we fails to reject the null hypothesis i.e., If we accept the null hypothesis, it means there are no significant difference between groups neither because of the experiment nor to chance.
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