SOC 260 Homework 10

The data for this homework is in “Data for HW 10.xls”

Use the best test, to answer each question.

BOLD YOUR ANSWERS

Remember for the ANOVA, if there is a between subjects variable and you find a difference, you must report post-hoc tests, and if there is a within subjects variable, you must report contrasts. Be careful and make sure you choose the correct test (some of the tests do not involve ANOVA). It may help to first identify the variables, and consult your notes as to what kind of test to do with what kind of variables.

1. Is there a relationship between the chirp-rate of crickets and the temperature?

What test do you do? Correlation

Report the appropriate statistics. r(13) = .835, n=15, p <.001

Paste a scatterplot below.

2. Is there a relationship between opinion on death penalty and opinion on abortion rights?

What test do you do? Correlation

Report the appropriate statistics. r(17) = -.733, n=19, p <.001

3. Ads were placed in a newspaper. The inquiries for the ads were compared based on day of the week.

What test do you do? One-way ANOVA

Report the appropriate statistics. F(4,15) = 21.315, p <.001

There is no difference between Monday and Tuesday at p=.960

There is no difference between Monday and Wednesday at p=1.000

There is no difference between Tuesday and Wednesday at p=.982

There is a difference between Monday and Thursday at p=.026

There is a difference between Monday and Friday at p=.002

There is a difference between Tuesday and Thursday at p=.007

There is a difference between Tuesday and Friday at p=.009

There is a difference between Wednesday and Thursday at p=.019

There is a difference between Wednesday and Friday at p=.003

There is a difference between Thursday and Friday at p<.001

Is one day of week better? Which one? Yes, Friday

4. Traps were placed in three different locations (upper, lower, and ground), and each trap baited with different baits (scent, sugar, chemical) to see which bait worked best. The number of moths per trap under for the different kinds of bait were compared to find out what bait and what location worked best.

What test do you do? Factorial ANOVA (Two-way ANOVA)

Report the appropriate statistics. Main effect for group is F(2,24) = .713, P= .500

The group*location interaction is F(4,24) = .645, P= .635

Main effect for location is F(2,12) = 10.635, P= .002

Is one location best? Which one?

Is one type of bait best? Which one?

5. A manager wants to…