stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
STUDY SESSION - PSY 10 Hypothesis Testing: Z-scores, Effect Size, and Power Flashcards | StudBud
Explore
/
STUDY SESSION - PSY 10 Hypothesis Testing: Z-scores, Effect Size, and Power
STUDY SESSION - PSY 10 Hypothesis Testing: Z-scores, Effect Size, and Power
33 terms
·
StudBud Administration
·
18 plays
For review for Exam 2 in Fan Jia Sp'22 PSY 010. Hypothesis testing: z-scores, effect size, and power
Flashcards
33 cards
F
Practice quiz
P
Host live
L
Questions
33
Answers
1
A nondirectional hypothesis test is also called
a two-tailed test.
a directional test.
a one-sided test.
a one-tailed test.
2
Which of the following does NOT increase power?
Set larger alpha
Increased effect size
Increased sample size
Increased standard deviation
3
What type of test is illustrated?
Two-tailed test
Left-tailed test
Right-tailed test
One-tailed test
4
What should your decision be, based on the test illustrated?
Do not reject the null hypothesis.
Accept the null hypothesis.
Do not accept the null hypothesis.
Reject the null hypothesis.
5
In a normal distribution, the center represents the
mean
All of these
mode
median
6
What is the upper tail critical value corresponding to a one-tailed test with α=0.01?
2.33
1.28
2.60
-1.28
7
Is the teacher testing a directional or nondirectional hypothesis?
nondirectional
directional
8
___ scales our sample statistics and calculations to terms of the
sampling distribution
, thus allowing inferences.
A normal curve
The standard deviation
The standard error
The population mean
9
What should your decision be, based on the test illustrated?
Do not accept the null hypothesis.
Reject the null hypothesis.
Accept the null hypothesis.
Do not reject the null hypothesis.
10
Say you calculate a z test, and z
obt
is negative. What happens if your unit normal table contains positive scores only?
Subtract your zobt from 1.00 to get the inverse.
You must look for a different table that has the negative values.
You cry openly during your exam.
It's not a problem because positive values mirror the negative ones.
11
In rare circumstances, probability values may be negative.
False
True
12
If H
0
is true and the statistician chose
not
to reject the null hypothesis, what has occurred?
Type I Error
Correct Decision
Type II Error
13
When conducting a z test, the result is significant if
|zobt| > |zcrit|
|zobt|=|zcrit|
|zobt|\ne|zcrit|
|zobt| < |zcrit|
14
Is the company testing a directional or nondirectional hypothesis?
directional
nondirectional
15
If a test value falls within the critical region, what is should be your conclusion?
Results Inconclusive
Reject H0
Accept H0
Do not reject H0
16
Which of the following calculates an inferential test statistic?
C
D
B
A
17
You roll a fair, 12-sided die. What are the chances of rolling an odd number?
1/2
1/12
2/12
5/6
18
A
statistically significant
difference (
p
< α) means the difference is likely too large to be due to chance alone.
True
False
19
Inferential statistics:
compare a test statistic against a population mean and critical values/regions (given by α) in
the sample's own frequency distribution.
the sample's distribution ONLY if it's normal.
a standard of errors.
the sampling distribution (of theorized sample means).
20
What does the level of significance indicate?
Probability of a Type II error occurring.
The confidence level with which the test passed.
Probability of a Type I error occurring.
The probability that a correct decision is made.
21
To which of the following concepts does statistical
power
most closely relate?
Type II error
p-value
significance
Type I error
22
State the null and alternative hypotheses.
H0 : μ=850, H1 : μ=1000
H0 : μ=850, H1 : μ\ne850
H0 : μ\le850, H1 : μ>850
H0 : μ\ne850, H1 : μ=850
23
What type of test is illustrated?
One-tailed test
Non-tailed test
Two-tailed test
24
The size of an effect, or how far away a distribution is from the H
0
distribution, is called
significance.
effect size.
power.
25
If H
0
is false and the statistician chose
not
to reject the null hypothesis, what has occurred?
Type I Error
Type II Error
Correct Decision
26
We can only
prove
the null hypothesis (H
0
) when our p-value is
extremely
large.
True
False
27
You roll a fair, 12-sided die. What are the chances of rolling a 10?
1/12
1
10
10/12
28
A probability of an outcome being '1' means there is a 100% guarantee of that outcome occurring.
False
True
29
How far scores have shifted in a population from the expected center (mean) is best characterized by
effect size.
power.
significance.
30
What are the critical values corresponding to a two-tailed test with α=0.05?
z= ± 1.65
z= ± 1.66
z= ± 1.96
z= ± 2.50
31
If H
0
is true and the statistician chose to reject the null hypothesis, what has occurred?
Type II Error
Type I Error
Correct Decision
32
State the null and alternative hypotheses.
H0 : μ=42, H1 : μ<42
H0 : μ=42, H1 : μ\ne42
H0 : μ=42, H1 : μ>42
H0 : μ\ne42, H1 : μ=42
33
Which of the following calculates an
inferential
(rather then descriptive) statistic?
B
D
A
C
