Amie Tunheim
Chapter 4 Notes: How to Get a Good Sample
Common research strategies
Sample survey: a subgroup of a large population is question on a set of topics
o
Used as though they are representative of the larger population should be if sample was chos
Amie Tunheim
Statistics 110
Homework #3
Chapter 13: 9, 10, 13, 20
9.
a) Population: all registered voters over age 25
Variables: graduated from college (yes or no); voting in the presidential election (yes or
no)
b) Population: people who were married dur
Amie Tunheim
Stats 110
Homework #2
Chapter 7: 12, 18, 19, 26
12.
a) Mean would be higher
b) Mean would be higher
c) About equal
d) About equal
e) About equal
18.
The average height of adult males in the United States is about 70 inches. This data is
norma
Amie Tunheim
Statistics 110
Homework #1
Chapter 1 - #2, 10, 14
2.
a) No, it cannot be conducted by a random experiment because only a small percentage
of the population goes to cultural activities. It would yield results that are
unrepresentative of the p
Amie Tunheim
Chapter 10: Relationships Between Measurement Variables
Statistical Relationships
Correlation: the strength of a certain type of relationship between two measurement variables
Regression: a numerical method for trying to predict the value of
Amie Tunheim
Chapter 10: Relationships Between Measurement Variables
Statistical Relationships
Correlation: the strength of a certain type of relationship between two measurement variables
Regression: a numerical method for trying to predict the value of
Amie Tunheim
Chapter 7 Notes
Measures of center
o
Mean: average
o
Median: the middle value of the list
o
Mode: most common value of the list
o
Outlier: one or two scores that are far removed from the rest of the data
Variability: how spread out the values
Amie Tunheim
Chapter 1-2 Notes
The Benefits and Risks of Using Stats Chapter 1
Statistics: a collection of procedures and principles for gaining and analyzing information in order to help
people make decisions when faced with uncertainty
To conduct a stat
Amie Tunheim
Chapter 13: Statistical Significance for 2x2 Tables
Measuring the Strength of the Relationship
Statistically significant: that a relationship the researchers observed in a sample was unlikely to have
occurred unless there really is a relation
Amie Tunheim
Chapter 13: Statistical Significance for 2x2 Tables
Measuring the Strength of the Relationship
Statistically significant: that a relationship the researchers observed in a sample was unlikely to have
occurred unless there really is a relation
Amie Tunheim
Chapter 4 Notes: How to Get a Good Sample
Common research strategies
Sample survey: a subgroup of a large population is question on a set of topics
o
Used as though they are representative of the larger population should be if sample was chos