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## Bundle of Notes for Week(3/31/16)

by: Haley Johnson

31

0

3

# Bundle of Notes for Week(3/31/16) STAT 110 001

Marketplace > University of South Carolina > Statistics > STAT 110 001 > Bundle of Notes for Week 3 31 16
Haley Johnson
USC
GPA 3.6

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This includes everything you will need to know to recieve a 100% on Chapter 14-15 Quiz and Homework 7!
COURSE
Introduction to Statistical Reasoning
PROF.
Wendy Cimino
TYPE
Bundle
PAGES
3
WORDS
KARMA
75 ?

## Popular in Statistics

This 3 page Bundle was uploaded by Haley Johnson on Thursday March 31, 2016. The Bundle belongs to STAT 110 001 at University of South Carolina taught by Wendy Cimino in Spring 2016. Since its upload, it has received 31 views. For similar materials see Introduction to Statistical Reasoning in Statistics at University of South Carolina.

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Date Created: 03/31/16
Chapter 14-15 Quiz 1. The most common way to display the relationship between two quantitative variables is a. Scatterplots 2. What are the possible values for r? a. -1 < r < 1 3. A straight line that is drawn through a scatterplot to summarize the relationship between explanatory and response variables is called a. Regression Line 4. The best evidence of causation comes from a. Experiments Homework for Chapter 22 1. Is a test of the claim that p ≠ 0.75 left-tailed, right-tailed, or two-tailed (two- sided)? a. Two tailed 2. If a hypothesis test gives a p-value of 0.0001, a. we have good evidence against the null hypothesis 3. Is the following statement a null hypothesis or an alternative hypothesis? “The proportion of adults who favor legalized gambling equals 0.50.” a. Null hypothesis 4. Suppose the national unemployment rate is 9.5%. Officials in a South Carolina rural county apply for state aid based on the claim that the local unemployment rate is higher than the national average. One official surveys 450 individuals in the county, of which 54 are unemployed. He then conducts a significance test in which the null hypothesis is that the unemployment rate in the rural county equals 9.5% versus the alternative that the unemployment rate is greater than 9.5%. From this test, he obtains a p-value of 0.035. What does this tell us? a. The unemployment rate is significantly greater than 9.5% at the 0.05 level of significance. 5. If a hypothesis test were conducted using α = 0.10, for which of the following p- values would the null hypothesis be rejected? a. 0.091 6. In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment and 32 were not smoking one year after the treatment. We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority (more than 50%) are smoking a year after the treatment. What is the null hypothesis? a. P= 0.50 7. In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment and 32 were not smoking one year after the treatment. We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority (more than 50%) are smoking a year after the treatment. What is the alternative hypothesis? a. p > 0.50 8. In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment and 32 were not smoking one year after the treatment. We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority (more than 50%) are smoking a year after the treatment. What is the value of the sample proportion of smokers who were smoking one year after the treatment? a. 0.55 9. In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment and 32 were not smoking one year after the treatment. We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority (more than 50%) are smoking a year after the treatment. What is the standard score of the sample proportion of smokers who were smoking one year after the treatment a. z = 0.8 10. In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment and 32 were not smoking one year after the treatment. We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority (more than 50%) are smoking a year after the treatment. What is the p-value of this test? a. 0.2119

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