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Probability values are (Points : 2)

2. Probability values are (Points : 2)

always more than 1.0        always positive numbers        only calculated for one-tailed tests        always expressed as a fraction
Question 3.3. An introductory psychology class has 9 freshman males, 15 freshman females, 8 sophomore males, and 12 sophomore females. If one student is randomly selected from this class, how would you calculate the probability of him or her being a sophomore? (Points : 2)

16/44        16/43        20/44        the answer cannot be determined with the information provided
Question 4.4. The probability of any event P(E) is calculated by ____. (Points : 2)

determining the percentage of possible events        dividing the number of outcomes favorable to E by the total number of possible outcomes        using the probability table        cannot be determined without additional information
Question 5.5. In a study to determine the effectiveness of a new medication ____. (Points : 2)

committing a Type I Error would be more dangerous than committing a Type II Error        committing a Type II Error would be more dangerous than committing a Type I Error        neither error would be much of a problem        it depends on the sample size and the standard deviation
Question 6.6. For a population with a mean of 80 and a standard deviation of 10, what is the Z score corresponding to an individual score of 95? (Points : 2)

+0.25        +0.50        +0.75        +1.50
Question 7.7. Snowball sampling is ____. (Points : 2)

a special nonprobability method        used when the desired sample characteristic is extremely rare        relies on referrals from initial subjects        all of the above are correct
Question 8.8. The shape of the normal distribution ____. (Points : 2)

depends on the size of the distribution        is “bell shaped”        is always higher on the right side than the left        is asymmetrical
Question 9.9. For a distribution of scores, which of the following Z score values represents the location closest to the mean? (Points : 2)

Z equals +0.50        Z equals +1.00        Z equals -1.00        Z equals -2.00
Question 10.10. If the researcher’s alternative hypothesis stated, “females in this test will score higher than males” ____. (Points : 2)

this would be a two-tailed test        it would be too early to make that statement        this would be a null hypothesis        this would be a one-tailed test