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A researcher conducts a study to investigate any effect that watching the news has on one’s...

A researcher conducts a study to investigate any effect that watching the news has on one’s level of optimism. One group of participants are randomly assigned to watch a 60-minute recording of a local news episode and another group of participants are randomly assigned to watch a 60-minute biopic covering the life of a famous news anchor. The 11 people in the biopic condition averaged an optimism level of 72 (SD = 11) and the 16 people in the news condition averaged an optimism level of 61 (SD = 18). Use this information to answer the following questions.

1. Create a 99% confidence interval to estimate the difference in optimism when comparing those who participate in the local news condition versus those who participate in the biopic condition. Be sure to properly report your confidence interval in brackets. Also, be sure to show calculations properly per the instructions for credit.

2. Regardless of your answer to the previous question, compute an effect size for this study. Be sure to show calculations properly per the instructions for credit.

Math   Statistics-And-Probability   
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Answer #1

Data in usual notation

For biopic condition

sample size is 11

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