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Hypothesis Testing
Hypothesis Testing
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1
Hypothesis Test Related to Mean Exercising in Two Cities is given:What will be the result of test statistics?
Since z < 1.645, we should fail to reject H0.
Since z < 1.645, we should reject H0.
Since z < 1.96, we should fail to reject H0.
Since z < -1.96, we should reject H0
2
Which of the following is the researcher usually interested in supporting when he is engaging in hypothesis testing?
Neither the alternative or null hypothesis
Both the alternative and null hypothesis
The null hypothesis
The alternative hypothesis
3
Regarding power of a hypothesis test, the power of the test is referred as:
1 – α
β
1 – β
α
4
Which of the following statements sounds like a null hypothesis?
Children who take vitamin C are less likely to become ill in flu season.
Tossing the coin is not fair.
There is no difference of salaries among male and female.
On the average, the dosage sold under this brand is not 50 mg
5
If you fail to reject the null hypothesis when the null hypothesis is actually false, what will be the results?
Type III error
Type IV error
Type II error
Type I error
6
The dividing point between the regions where the null hypothesis is rejected and not rejected is said to be:
Acceptance region
Critical region
Level of significance
Critical value
7
A passing student is failed by an examiner, it is an example of:
Type II error
Type I error
Sampling error
Unbiased decision
8
Referring to the given diagram of significance level, what will be the prediction if it is α /2?
Two tailed significance level
One tailed significance level
Left tailed significance level
Right tailed significance level
9
Referring to the diagram given, the Critical value Zα of Z, which is the correct value?
Right tailed test of 5%
Two-tailed test of 5%
Left tailed test of 5%
One-tailed test of 5%
10
Hypothesis Test Related to Awareness Generated by Two Commercials is given: What will be the result of test statistics?
Since z < 1.645, we should fail to reject H0.
Since z > -1.96, we should fail to reject H0.
Since z < 1.96, we should fail to reject H0.
Since z < 1.645, we should reject H0.
11
Choose the
TRUE
statement of the following.
(1-α) is the probability we accept the null when it was in fact false.
P rejects the null hypothesis when it is false =1-α.
P rejects the null hypothesis when it is false =1-β.
(1-β) is the probability we reject when the null is in fact true.
12
A failing student is passed by an examiner, it is an example of:
Sampling error
Type II error
Type I error
Unbiased decision
13
Referring to the diagram given, the Critical value Zα of Z, which is the correct value?
Two-tailed test of 5%, Zα = 1.96
Right tailed test of 5%, Zα = 1.96
Left tailed test of 5%, Zα= -1.96
One tailed test of 5%, Zα = 1.28
14
Referring to the diagram given, what will be the interpretation of statistical test?
One-tailed test
Test given with the critical value of Z - α/2
Two-tailed test
Test given with the critical value of Zα/2
15
Hypothesis testing implies a chance of making an incorrect decision. If H
o
is true and we reject it is referred as:
Type I error
Standard error
Sampling error
Type II error
16
Making an assumption about a population parameter, which developed for the purpose of testing, is referred as:
Hypothesis testing
Level of significance
Test statistics
Simple hypothesis
17
The probability of rejecting the null hypothesis when it is true is referred as:
Type 1 error
Level of confidence
Power of the test
Level of significance
18
The choice of one-tailed test and two-tailed test in hypothesis testing depends upon:
Simple hypothesis
Null hypothesis
Composite hypothesis
Alternative hypothesis
19
A range of numbers has a certain probability of including the population parameter over the long run, can be referred as
Critical value
Coefficient variation
Confidence interval
Probability limit
20
If the critical region is located equally in both sides of the test-statistic, the test is referred as:
One tailed
Two tailed
Left tailed
Right tailed
