HW 4
(12 pts)
1. Please use the z-table to find the z* that corresponds to the given confidence levels as below (The ztable is available on the Blackboard in the folder titled Mathematical Tables; 5 pts total)
Confidence level
z*
80%
90%
95%
98%
99%
If yo
HW 5
(12 pts)
1. Multiple-choice questions on AP exams have five options: A, B, C, D, and E. A random sample of the
correct choice on 500 multiple-choice questions on a variety of AP exams shows that B was the most
common correct choice, with 150 of the 5
HW 1
(12 pts total)
1. A researcher is collecting data on a random sample of 500 undergraduate students at Purdue. The
following table shows the data values of five variables for the first 12 cases (5 pts total).
Tuition Status*
GPA
Colleges/Schools
SAT S
STUDY QUESTIONS & KEYWORDS
CHAPTER 6:
SAMPLING DISTRIBUTIONS OF MEANS: THE SINGLE SAMPLE t
6.1.
How is a sampling distribution of means different from a distribution of raw
scores?
6.2.
In words, describe the differences between the formulas for a z score
STUDY QUESTIONS & KEYWORDS
Chapter 7: Differences Between Means
Independent and Related Samples
7.1.
Describe the characteristics of the sampling distribution of differences
between means.
7.2.
In the theoretical distribution of difference scores, how are
STUDY QUESTIONS & KEYWORDS
Chapter 5: The Normal Distribution and Probability
5.1 What is the difference between an empirical distribution and a theoretical
distribution?
i. empirical distributions - distributions of events that you have
actually observed
STUDY QUESTIONS & KEYWORDS
Chapter 3: Central Tendency: Finding the Typical Score
3.1. Define measure of central tendency
3.2. Define the term mode.
3.3. Under what circumstances would the mode be the preferred measure of central tendency?
3.4. What might
STUDY QUESTIONS & KEYWORDS
Chapter 2: Types of Data & Frequency Distributions
2.1 Define a nominal scale and give an example not in your book.
a. A nominal scale is the simplest form of measurement. The only function of a nominal scale is to
distinguish o
STUDY QUESTIONS & KEYWORDS
Chapter 4: Variability
4.1.
What would be the range of this distribution: 2, 3, 3, 4, 5?
4.1.1. 3 ( you would add 1 to get a range of 4)
4.2.
Why is a one added to the range when it is calculated with continuous interval or rati
STUDY QUESTIONS & KEYWORDS
Chapter 1: Introduction to Statistics and Research Design
1.1.
Define statistical analysis
1.1.1. Statistical analysis is a method of recording, organizing, and interpreting data.
1.2.
What makes astronomy and psychology science
Ch. 8 - Pg. 1
Chapter 8
ONE-WAY ANALYSIS OF VARIANCE
CONTENTS
THE LOGIC OF THE ANALYSIS OF VARIANCE
Limitations on the Use of t
Theoretical Distribution when the Null Hypothesis is True
Theoretical Distribution when the Null Hypothesis is False
Variance W
Ch. 6 - Pg. 1
CHAPTER 6
SAMPLING DISTRIBUTIONS OF MEANS: THE SINGLE SAMPLE t
CONTENTS
SINGLE SAMPLE STATISTICS
z and the Sampling Distribution of Means
The Standard Error of the Mean
The Central Limit Theorem
The Sampling Distribution of Means and t
t and
HW 2
(12 pts plus 1 bonus point)
1. A group of 100 college students were surveyed about their gender and whether they had decided on a
major. The results are as below: (4 pts total)
Female
27
18
45
Decided
Undecided
Total
Male
33
22
55
Total
60
40
100
(1)
HW 5
(12 pts)
1. Multiple-choice questions on AP exams have five options: A, B, C, D, and E. A random sample of the
correct choice on 500 multiple-choice questions on a variety of AP exams shows that B was the most
common correct choice, with 150 of the 5
HW 3
(12 pts)
1. A survey of 1,000 students at Purdue indicated that 80% prefer to have more summer online classes.
The standard error for this statistic is 0.02. What is the 95% confidence interval for the true proportion of
all students at Purdue that p
HW 4
(12 pts)
1. Please use the z-table to find the z* that corresponds to the given confidence levels as below (The ztable is available on the Blackboard in the folder titled Mathematical Tables; 5 pts total)
Confidence level
z*
80%
1.282
90%
1.645
95%
1
Due Date: Jan 28 (Wednesday)
HW 1
(12 pts total)
1. A researcher is collecting data on a random sample of 500 undergraduate students at Purdue. The
following table shows the data values of five variables for the first 12 cases. (5 pts total)
Tuition Statu
HW 2
(12 pts plus 1 bonus point)
1. A group of 100 college students were surveyed about their gender and whether they had decided on a
major. The results are as below: (4 pts total)
Female
27
18
45
Decided
Undecided
Total
Male
33
22
55
Total
60
40
100
(1)
Ch. 7 - Pg. 1
Chapter 7
DIFFERENCES BETWEEN MEANS: INDEPENDENT AND RELATED SAMPLES
CONTENTS
A t TEST FOR TWO INDEPENDENT SAMPLES
The Difference Score
Theoretical Distribution of Difference Scores
Relationship of the Independent-Samples t to z
Assumptions