23/08/2016
last week you learned about:
Normal curve
Introduction to Hypothesis Testing
Probability
Chapter 4 (sixth edition)
Chapter 5 up to sixth edition.
The difference between a sample and a population
Population parameters
Sample characteristics
STA1PSY Practice Class 5
1. If you want to know if a new employee incentive program really works, how would you
test the hypothesis that it does work?
a. Try to disprove the hypothesis that it does work.
b. Try to prove the hypothesis that it does work.
c
STA1PSY Practice Class 6
1.
The mean of the distribution of sample means is
a.
the square root of the original population mean.
b.
the original population mean divided by the sample size.
c.
the same as the original population mean.
d.
the sample mean mul
STA1PSY Practice Class 1
In this practice class we shall construct a frequency table and a histogram by hand.
1. Twenty children were interviewed about their attitude to school. At the end of the
interview, the interviewer rated each childs attitude on a
STA1PSY Practice Class 2
1. What is the mean of the following scores? 2, 4, 6.
(a) 4
(b) 6
(c) 4.5
(d) 22.9876534
2. What is the standard deviation of the following scores? 2, 4, 6.
(a) 2.45
(b) 1
(c) 2
(d) 4
3. What is the mode of the following scores? 3
STA1PSY Practice Class 4
1. How do you calculate probability?
a. The number of all possible outcomes divided by the number of possible
successful outcomes.
b. The number of all possible outcomes multiplied by the number of possible
successful outcomes.
c.
STA1PSY Practice Class 7-2016
1. Setting the significance level at 0.10 instead of the more usual 0.05 increases the
likelihood of
a. A Type I error.
b. A Type II error.
c. Failing to reject the null hypothesis.
d. Accepting null hypothesis when, in fact,
STA1PSY Practice Class 8 - 2016
1. If a sample has 27 people in it, the degrees of freedom used in the formula to estimate
the population variance would be
a.
b.
c.
d.
26
27
272
27
2. If you know the samples variance but not the population s variance,
a.
STA1PSY
Assignment 2
Due: 4pm Friday Week 5
Name:_
Student Number:_
Demonstrator:_
Note: For the questions required SPSS output, you can produce the graphs in SPSS, use
the print screen PrtSc key of your keyboard to copy the graph and then paste it in the
STA1PSY
Assignment 3: Answer sheet
Name: Eliane Abi-kheir
Student Number: 18913310
Demonstrator: Jerry Lai
Computer Lab Time: Wednesday 11-12
1. B- a two-tailed prediction
[
1
mark]
2. A- one-tailed because the study is only interested in whether the exer
STA1PSY
Answer sheet
Assignment 1:
Name: Eliane Abi-kheir
Student Number: 18913310
Demonstrator: Jerry Lai
Computer Lab Time: Wednesday 11-12
1.
2.
3.
4.
5.
D Variable
C- Bimodal
D Frequency
D Nationality of the car a person owns (American, Japanese, etc.
10/07/2016
Probability and probability distribution
Some Key Ingredients for
Inferential Statistics
The Normal Curve,
Probability, and Sample
versus Population
Chapter 4 (up to 6th edition)
Chapter 3 (6th edition)
So far we have been looking at methods o
23/08/2016
Chapter 6 sixth edition
Chapter 7 Previous editions
Making Sense of Statistical
Significance
Decision Errors, Effect Size, and
Statistical Power
2
This weeks objectives
This week we want to examine hypothesis tests in more detail, with an emph
29/08/2016
Chapter 6
Hypothesis Tests with
Means of Samples
What we studied previous two weeks:
When we were given a score from a normal population with known
mean and standard deviation, we could calculate the z-score and
could determine were exactly th
STA1PSY Practice Class 3
1. A variable that is predicted by another variable is called a(n)
a.
b.
c.
d.
predictor variable
positive variable
independent variable
response variable
2. What is the difference between a positive correlation and a negative
cor