1. Notation for comparing two population means Aa Aa Bullying,\" according to no

Question

1. Notation for comparing two population means Aa Aa Bullying," according to noted expert Dan Olweus, "poisons the educational environment and affects the learning of every child." Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being not only of the victims but also of bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure anxiety in a group of bully-victims and a group of bystanders using an 18-item, 5-point anxiety scale. Assume scores on the anxiety scale are normally distributed The group of 23 bully-victims scored an average of 40.1 with a sample standard deviation of 10.1 on the anxiety scale. The group of 28 bystanders scored an average of 46.8 with a sample standard deviation of 11.6 on the same scale. Suppose you intend to draw inferences about the difference between two population means. In preparation, you call the sample of bully-victims sample 1 and the sample of bystanders sample 2. Organize the provided data by completing the following table: Sample 1 Sample 2 n1 23 28 not provided/unknown 46.8 , not provided/unknown Hz, 40.1 not provided/unknown 10.1 o," ?2. not provided/unknown 11.6 This study uses means, you need the value of . To compute a 95% confidence interval of the difference in population

Explanation / Answer

This study uses independent samples. To compute a 95% confidence interval of the difference in population means, you need t0.025.

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