A quick check to see how good you are at paired samples T-tests

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You would like to measure the effect of sunlight on happiness. You ask a group of 5 students to sit in the sun for one hour a day for one month. After one month, you measure student happiness on a scale from 1 to 7. After measuring your students on happiness, you ask the same students to not expose themselves to sun, every day for one month. After one month, you measure student happiness on a scale from 1 to 7.  Note that each participant participates in both conditions of the experiment. The following are the results.  You can see happiness ratings for each participant below.

 

Condition 1: Sun exposure

Condition 2: No sun exposure

Participant 1 = 1

Participant 2 = 2

Participant 3 = 3

Participant 4 = 1

Participant 5 = 2

Participant 1 = 5

Participant 2 = 7

Participant 3 = 5

Participant 4 = 4

Participant 5 = 6

 

1. Conduct a Paired Samples T-Test in SPSS.

 

2. Based on your experimental design, report the type of test used and what it was used to test by filling in the blanks of the following sentence.

 

 

“A ________________________ was conducted to compare______________________

 

in __________________________ and __________________________ conditions.”

 

 

3. Fill in the blanks of the following sentence and circle significant or not significant.

 

 

“There was a significant (not a significant) difference in the scores for students who

 

were exposed to an hour of sunlight each day  (M=_______, SD=________) and those

 

who were not exposed to sunlight each day (M=_______, SD=_________) conditions;

 

t(_______)=_______, p = ________.”

 

 

4. Write a sentence that states what your results mean in terms of your experiment – in words that an inexperienced scientific reader could understand.


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