Question
Name: Exam 1 Psych 266 F17 Research results from a sample and a hypothesis about a population Research results from a population and a hypothesis about a sample Research results from a population and a hypothesis about the population Research results from a sample and a hypothesis about the sample a. c. d. 65. For a hypothesis test evaluating the effect of a treatment on a population mean, what basic assumption is made concerning the treatment effect? a. If there is a treatment effect, it will increase the scores. b. If there is a treatment effect, it will decrease the scores. e. If there is a treatment effect, it will add (or subtract) a constant to each score. d. If there is a treatment effect,it will multiply (or divide) each score by a constant. 66. Which of the following accurately describes the critical region? a. Outcomes with a very low probability if the null hypothesis is true b. Outcomes with a high probability if the null hypothesis is true c. Outcomes with a very low probability whether or not the null hypothesis is true d. Outcomes with a high probability whether or not the null hypothesis is true 67. 05, how are the boundaries for the critical region determined? With a Boundaries are drawn so there is 2.5% (025) in each tail of the distribution. Boundaries are drawn so there is 5% (.05) in each tail of the distribution. Boundaries are drawn so there is 10% (.10) in each tail of the distribution. Boundaries are drawn so there is 5% (05) in the center of the distribution. b. c. d. 68. A sample ofn-25 individuals is selected from a population with 80, and n treatment is administered to the sample. What is expected if the treatment has no effect?
Explanation / Answer
Ans:
69)When the null hypothesis is true and you reject it, you make a type I error.
Rejecting a true null hypothesis.
Option b is correct.
70)When the null hypothesis is false and you fail to reject it, you make a type II error.
failing to reject a false null hypothesis.
Option c is correct.
71)
Reject H0 and make type I error
Option a is correct.
72)
z=2.37
p-value(2 tailed)=P(z<-2.37)+P(z>2.37)=0.0178
For alpha=0.05
As,p-value<0.05,we reject H0.
For alpha=0.01
As,p-value>0.01,we fail to reject H0.
Option a is correct.
73)Option d is correct.
74)Option d is correct.
