A researcher is interested in determining whether background music has had an effect on participants' word recall. An experiment was conducted during which one group was given a list of words to study and then asked to recall the words while light jazz was playing in the background the entire time. The second group did the same thing in a completely silent environment. Below are percentages of correctly recalled words for each group. Conduct a two-samples t-test (equal variances assumed) to determiine if there was a significant difference between average percentages of recalled words in both groups. Assume alpha =0.05.
A researcher is interested in determining whether background music has had an effect on participants' word recall. An experiment was conducted during which one group was given a list of words to study and then asked to recall the words while light jazz was playing in the background the entire time. The second group did the same thing in a completely silent environment.
Below are percentages of correctly recalled words for each group.
Conduct a two-samples t-test (equal variances assumed) to determiine if there was a significant difference between average percentages of recalled words in both groups.
Assume alpha =0.05.
In your answer, state the null and the research hypotheses and explain whether the results of the two-sample test led you to reject or fail to reject the null hypothesis, and what it means.
Copy the data below into Google Sheets and perform t-test: two-sample (assuming equal variances). Copy/paste the results into the question response window. In your answer, state the null and the research hypotheses and explain whether the results of the two-sample test led you to reject or fail to reject the null hypothesis, and what it means.
| Music | No Music |
| 79.0 | 85.6 |
| 74.9 | 78.92 |
| 60.47 | 93.1 |
| 90.1 | 88.4 |
| 87.01 | 92.35 |
| 64.83 | 100 |
| 90.4 | 78.9 |
| 83.58 | 99.1 |
| 66.51 | 88.9 |
| 91.36 | 94.43 |
| 92.78 | 80.55 |
| 70.08 | 90.60 |
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