Statistics HW
Nouf777Homework Assignment #5
1. The Humane Society of the United States keeps scorecards on legislators regarding their support for animal welfare legislation. Below, you will find a random sample of legislators with their Human Society scores and their religious affiliation:
Name Score Religious Affiliation
Smith 45 Evangelical
Johnson 65 Jewish
Adams 50 Catholic
Jones 75 Mainline Protestant
Quincy 35 Evangelical
Black 40 Evangelical
White 60 Jewish
McTibbs 70 Mainline Protestant
Avery 50 Evangelical
Elway 30 Evangelical
You hypothesize that Evangelical Christians will have lower scores from the Humane Society than will representatives of other religions. Let’s find out if you are right!
What is the mean score for Evangelical Christians? _____________
What is the mean score for everyone else? _____________
What is the null hypothesis?
Using a difference of means analysis (show your work on a separate page), what is the standard error for the difference of means?
_________________
With a 95% level of confidence, can we reject the null hypothesis? Explain your answer in a sentence or two.
2. The Humane Society of the United States conducts a survey of 500 Americans asking whether they support a federal ban on dog fighting. Of that 500-person sample, 53% say they support a ban on dog fighting.
What is the margin of error (assuming we want 95% confidence levels) of our survey?
Are we statistically confident that a majority of Americans support the dog fighting ban?