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

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You would like to measure the effect of the color green on job satisfaction. You ask one group of employees to work in an office that has been painted green. You ask a second group of employees to work in an office that is not painted green. Each participant participates in only one condition of the experiment. After one week, you ask all employees to rate how satisfied they are with their job on a scale from 1 to 10. The following are the results.  Analyze these results using the appropriate type of t-test.

 Condition 1: Walls painted green Condition 2: Walls not painted Participant 1 = 9 Participant 2 = 8 Participant 3 = 10 Participant 4 = 10 Participant 5 = 7 Participant 1 = 5 Participant 2 = 3 Participant 3 = 2 Participant 4 = 1 Participant 5 = 4

1. Conduct and Independent 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.

“An _________________________ 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 employees

who worked in an environment that was painted green (M=_______, SD=________)

and those  who worked in an  environment that was not pained green (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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