__________ 51. For the following question(s): Professor Juarez thinks the studen
ID: 2958324 • Letter: #
Question
__________ 51. For the following question(s): Professor Juarez thinks the students in her statistics class this term are more creative than most students at this university. A previous study found that students at this university had a mean score of 35 on a standard creativity test. Professor Juarez finds that her class scores an average of 40 on this scale, with an estimated population standard deviation of 7. The standard deviation of the distribution of means comes out to 1.63.In a study with 10 degrees of freedom, what would be your cutoff score for a t distribution using a one-tailed test at the .05 level of significance?
a. 1.372
b. 1.813
c. 2.764
d. 2.228
__________ 52. " S2Within" equals:
a. the sum of squares within each group
b. the square root of the standard within-group deviations from the mean
c. the squared variance within groups
d. the population variance estimate based on the variation within each of the groups
__________ 53. An important characteristic of an F ratio is that:
a. when looking up the cutoff on a table, the degrees of freedom are needed from the numerator, denominator, and the sum of squares calculation
b. it is never less than 0
c. it is negatively skewed (the long tail to the left)
d. the standard t distribution (for 30 df) is used as a comparison distribution
__________ 54. When using the F table, one must pay attention to:
a. significance level
b. between-groups degrees of freedom
c. within-groups degrees of freedom
d. all of the above
__________ 55. In a chi-square test for independence, the null hypothesis is that:
a. the two population variances are independent
b. the two variables are independent in the population
c. the means of the populations are not equal
d. the means of the populations are equal
__________ 60. Suppose you are testing a hypothesis about which of various professors are most favored by psychology students at a particular university. The appropriate analysis would be:
a. ANOVA
b. t test for independence
c. chi-square test
d. correlation
Explanation / Answer
In a study with 10 degrees of freedom, what would be your cutoff score for a t distribution using a one-tailed test at the .05 level of significance? b. 1.813 __________ 52. " S2Within" equals: b. the square root of the standard within-group deviations from the mean __________ 53. An important characteristic of an F ratio is that: b. it is never less than 0 __________ 54. When using the F table, one must pay attention to: d. all of the above __________ 55. In a chi-square test for independence, the null hypothesis is that: b. the two variables are independent in the population __________ 60. Suppose you are testing a hypothesis about which of various professors are most favored by psychology students at a particular university. The appropriate analysis would be: c. chi-square test
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