PSYC 11 - Midterm 3 prep

What are the six inferential statistics we have learned about? (Select all that apply)

• T-tests (One-sample, independent, and paired-samples

• ANOVA (One-Way, One-Factor Repeated Measures, Factorial)

• Correlation

• Regression

• Descriptive Statistics (Mean, median, mode)

Answer explanation

Inferential statistics involve methods to draw conclusions about a population.

Isabel wants to determine if her section’s average midterm score is significantly different from the class average.  What inferential statistic should she calculate? (Select one)

• One-sample t-test

• Independent sample t-test

• Paired-samples t-test

• One-Way ANOVA

Lori believes that the average sugar content of a 12oz can of Coke is significantly different depending on what country it was distributed in.  She wants to compare Cokes from Japan, America, Germany, and Liberia.  What inferential statistic should she compute? (Select one)

• One-sample t-test

• One-factor Repeated-Measures ANOVA

• Factorial ANOVA

• One-Way ANOVA

Will Lori need to compute a post hoc test? (Select one)

• Yes

• No

• It depends

When should you conduct a post-hoc test? (Select all that apply)

• When you have 3 or more group means

• When you have have the time to do it

• When you have a significant F statistic (p < .05)

• When you do not have a significant F statistic (p > .05)

Jack is from Seattle and he is convinced that SoCal people don’t know how to drive in the rain.  He is able to get a hold of the number of accidents that occurred during a rainy week in SoCal and the number of accidents that occurred during a rainy week in Seattle.  Which is the best test to perform in order to determine if there is a significant difference in rainy accidents between SoCal and Seattle? (Select one)

• One-sample t-test

• Independent samples t-test

• Paired-samples t-test

• One-Way ANOVA

Violeta believes that caffeine will improve cold weather performance for a cyclist.  Participants are recruited and then broken into matched pairs based on age and weight.  One of the pair receives caffeine before completing 20k time trial in an industrial freezer, the other gets a placebo.  Violeta now has a lot of times, but doesn’t know how to analyze them.  She comes to you for help.  How should she analyze her data? (Select one)

• Independent samples t-test

• Paired-samples t-test

• One-Way ANOVA

• One-Factor Repeated Measures ANOVA

You want to design an experiment to find out the effect of listening to three different lecturers.  You recruit 20 undergraduates and have each of them listen to a lecture by three different professors.  After each lecture you have the undergraduate fill out a questionnaire about how interesting they found the lecture.  What test should you use to analyze your data? (Select one)

• Independent samples t-test

• Paired-samples t-test

• One-Way ANOVA

• One-Factor Repeated Measures ANOVA

Will is a firm believer that ice cream and exercise makes people happy.  To determine the effects of ice cream and exercise participants are assigned to the ice cream or no ice cream group and to 1 of 3 exercise groups: cardio, weight lifting, or no exercise.  At the end of the study participant’s happiness is measured.  What test should he use to answer his question? (Select one)

• Independent samples t-test

• One-Way ANOVA

• One-Factor Repeated Measures ANOVA

• Factorial ANOVA