Research and method psychology Quiz Questions 2015

Quiz

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You participated in the "facial recognition lab". That exercise is the basis for the mini lab report. At the end of the exercise you were given a number of "hits" which is operationally defined as the number of correct responses.
The data below is your data set for your mini lab. For this assignment, you are the researcher. You gave the facial recognition lab to 40 students, 20 males and 20 females. The data set below contains the number of correct hits for each subject.
Complete the calculations below based on the data provided.
Information
males females
5 9
5 8
8 7
5 7
6 9
7 8
4 8
5 8
3 9
4 10
8 7
5 9
10 8
6 9
5 7
5 9
8 8
7 7
5 9
6 7
Mini Lab data file
Question 1 (1 point)

Calculate the Mean number of correct responses (hits) for male subjects.
Round your answer to the nearest hundredths place.
For example: 1.11


Question 1 options:

View hint for Question 1

The mean is the sum of the male correct hits divided by the number of males (20).
Your answer should have 3 numbers: _ . _ _
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Question 2 (1 point)

Calculate the Standard Deviation (SD) of the correct responses for male subjects.
Round your answer to the nearest hundredths place.
For example: 1.11



Question 2 options:

View hint for Question 2

The standard deviation for a sample of numbers:

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Question 3 (1 point)

Calculate the Standard Error of the Mean (SEM) of the correct responses for male subjects.
Round your answer to the nearest hundredths place.
For example: 1.11
Question 3 options:

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where
? is the standard deviation of the population.
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Question 4 (1 point)

Calculate the Mean number of correct responses (hits) for female subjects.
Round your answer to the nearest hundredths place.
For example: 1.11
Question 4 options:

View hint for Question 4

The mean is the sum of the female correct hits divided by the number of females (20).
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Question 5 (1 point)

Calculate the Standard Deviation (SD) of the correct responses for female subjects.
Round your answer to the nearest hundredths place.
For example: 1.11



Question 5 options:

View hint for Question 5

The standard deviation for a sample of numbers:

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Question 6 (1 point)

Calculate the Standard Error of the Mean (SEM) of the correct responses for female subjects.
Round your answer to the nearest hundredths place.
For example: 1.11
Question 6 options:

View hint for Question 6

where
? is the standard deviation of the population.
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Question 7 (1 point)

Use a statistical software program or your favorite stats website and find the t value for an unpaired 2 sample t test using the data from the 2 groups, the males and the females.
Suggested website: http://graphpad.com/quickcalcs/ttest1/
Round your answer to the nearest hundredths place.
For example: 1.11
Question 7 options:

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Question 8 (1 point)

What is the degrees of freedom associated with this t test?
Enter the numerical value. For example: 99; not ninety-nine
Question 8 options:

View hint for Question 8

DF = (n + n) - 2
the first n is the number of subjects in group 1; the second n the number of subjects in group 2. You subtract 2 because there are 2 groups.
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Question 9 (1 point)

The p value associated with your t value is:
Question 9 options:

less than .05

greater than .05

I have no idea.
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Question 10 (1 point)

Based on your calculations, would you reject the null hypothesis that there is no difference between males and females on this facial recognition task?
Question 10 options:

Yes, I would reject the null hypothesis.

No, I would not reject the null hypothesis.

I have no idea.
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