Research Methods: Probability & Significance Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

When interpreting a statistical test. Where is the critical value found?

A

In the table provided

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the conventional level of significance in psychology?

A

0.05/5%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

To identify the critical value what do we need to know?

A

One or two tailed test
Number of participants (N) or Degrees of freedom (df)
Significance level

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In the sign test the calculated value is the ….

A

least frequent sign

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

If the research is not significant which hypothesis do you accept and reject?

A

Accept the null hypothesis and reject the alternative hypothesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

If the research is significant which hypothesis do you accept and reject?

A

Accept the alternative hypothesis and reject the null hypothesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

If a researcher uses a lenient p-value. Which error may they make?

A

Type one error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

If a researcher uses a strict p-value. Which error may they make?

A

Type two error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What may the researcher think if they make a type one error?

A

Think the results are significant when they are not

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What may the researcher think if they make a type two error?

A

Think the results are not significant when they are

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In a type one error which hypothesis does a researcher wrongly accept and reject?

A

Wrongly accept the alternative hypothesis and reject the null hypothesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In a type two error which hypothesis does a researcher wrongly accept and reject?

A

Wrongly accept the null hypothesis and reject the alternative hypothesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How do you check for a type one error?

A

Go to a stricter level of significance. If it stays significant there is no error. if it becomes not significant there is an error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How do you check for a type two error?

A

Go to a lenient level of significance. If it stays not significant there is no error. if it becomes significant there is an error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which significance level strikes the balance between making a type one or type two error?

A

0.05/5%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The researcher conducted one-tailed test, with 1 degree of freedom with a level of significance of 5%. The calculated value was 3.98. Explain if the research is significant and which hypothesis is accepted?

A

Significant
Calculated value of 3.98 was greater than the critical value of 3.84.
The alternative hypothesis was accepted and the null hypothesis rejected.

17
Q

The researcher used a one tailed test, the significance level is 2.5% and the sample size was 37. Explain if the research is significant when the calculated value was 90.

A

Not significant
The calculated value of 90 is not less than the critical value of 87, so not significant.
The null hypothesis is accepted and alternative hypothesis rejected.

18
Q

The sample size was 18 and the significance level was 5% using a non-directional hypothesis. The calculated value was -0.472. Explain whether the research is significant.

A

Significant
The calculated vale of -0.472 was equal to the critical value of 0.472 so the research is significant. The alternative hypothesis is accepted and the null hypothesis rejected.