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7.1-7.2 Intro to Hypothesis Testing and Testing for a Proportion Flashcards | StudBud
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7.1-7.2 Intro to Hypothesis Testing and Testing for a Proportion
7.1-7.2 Intro to Hypothesis Testing and Testing for a Proportion
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Statistics Hypothesis Testing Introduction
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Would we reject or fail to reject on the scenario below?
Fail to Reject
Reject
2
What calculator command will find a Standardized Test Statistic?
1prop-ZInt
invnorm
normalcdf
None of these (use a formula).
3
If your null hypothesis is H
0
: p=.23 then you have a...
headache
right-tailed test
left-tailed test
two-tailed test
4
Find the critical z value used to test a null hypothesis
when α= 0.05 for a left tailed test
± 1.645
1.96
± 1.96
-1.645
5
If your null hypothesis is H
0
: p⦤ .23 then you have a...
headache
right-tailed test
left-tailed test
two-tailed test
6
Rejecting a null hypothesis is PROOF that the null is false.
yep
nope
7
The 2 possible conclusions of a hypothesis test are to reject the null hypothesis or to...
support the null
fail to reject the null hypothesis
accept the null hypothesis
reject the alternative hypothesis
8
What is a p-value?
The probability that we are right.
1-C
The probability of a success on one trial
The probability of getting a result as or more extreme than the sample
9
What does this formula find: 1 - C
Alpha Level
P- Value
Standardized Test Statistic
Critical Value
10
The standardized test statistic -1.063. At α.05. Do we reject or fail to reject Ho?
Fail to Reject Ho
Reject Ho
Not enough information
Question does not apply
11
In a hypothesis test for proportions, what is the test statistic?
p hat
Z
Zc
p
12
If our p-value is less than alpha,
we support the null.
we reject the null.
we fail to reject the null.
we reject the alternative.
13
What does Zc stand for?
confidence level
critical z score
Zoo of Cambodia
test statistic
14
Find the p-value.
.8944
.0008
.9992
.1056
15
What does this formula find?
Critical Value
Test Statistic
P- Value
Standardized Test Statistic
16
Find the critical z-value of 2-tailed test, alpha =0.01
2.575
2.33
17
What calculator command will find a Critical Value?
normalcdf
None of these (use a formula).
1prop-ZInt
invnorm
18
Write hypotheses for the situation: Is a coin fair?
H0: p>.50 & Ha: p<.50
H0: p≠..50 & Ha: p =.50
H0: p=.50 & Ha: p≠.50
19
What calculator command will find a P-Value?
invnorm
None of these (use a formula).
normalcdf
1prop-ZInt
20
Alpha is:
Confidence level
1-C, the probability of rejecting a false null
1-C, the probability of rejecting a true null
alpha dog
21
What calculator command will find an alpha level?
1prop-ZInt
None of these (use a formula).
invnorm
normalcdf
22
Alpha Level is .05...
fail to reject Ho at alpha = 0.05
reject Ho at alpha = 0.01
accept Ha at alpha = 0.01
reject Ho at alpha = 0.05
23
If you have a confidence level of 99%, what is the alpha value?
.10
.001
.01
.05
24
Given H
0
: p ≥ .8 H
a
: p<.8 determine if the test is left-tailed, right tailed, or two tailed.
Big-Tailed
Left-tailed
Right-tailed
Two-tailed
25
Make a decision for the given α level? P-value = 0.234 when α = 0.05
Reject H0
Support H0
Fail to Reject Ho
26
If H
0
: p ≥ .23 & H
a
: p< .23 then you have a...
right-tailed test
two-tailed test
left-tailed test
headache
27
Mike claims the average price for houses in Chicago is more than $500k. Write the claim as a hypothesis.
Ha : μ > $500,000
H0 :μ= $500,000
H0: μ > $500,000
Ha :μ = $500,000
28
What p-value would lead me to fail to reject the null hypothesis?
.000008
.00003
.45
.00000008
29
If our p-value is greater than alpha,
we reject the alternative.
we fail to reject the null.
we support the null
we reject the null.
30
What are the two types of hypotheses?
Null and Alternative
Left and Right
Yin and Yang
Null and Alpha
