Spider: People have anxiety and developed some form of arachnophobia (fear of spider) when they encounter either real or picture spiders. A total of 10 individuals were randomly chosen and exposed to either picture or real spider and requested to rat their anxiety level from 0 to 100 (0 indicates the least fear and 100 indicates the most fear). These data were summarized as: mean difference in anxiety (Real - Picture spider) = 6.5 and standard deviation of difference = 9.91. Test at the 5 percent significance level, whether people have higher anxiety with real spiders than picture spiders.
(Note: questions asked here are not listed same order as those five steps of hypothesis testing discussed in the class, you need to keep in mind while answering them. Those five steps of hypothesis testing are:
Step 1: State the null (H0) and alternate (H1) hypotheses
Step 2: Set the criteria for a decision
Step 3: Calculate test statistics
Step 4: Make a decision
Step 5: Draw a meaningful conclusion)