A researcher chose a random sample of 102 Facebook users from her department's participant pool. She administered the NPI-16 (a short measure of narcissism) to each participant, and she also recorded how many Facebook friends each one had. Her results showed that mean number of Facebook friends was 250 with a standard deviation of 100, and the mean NPI-16 score was 5 with a standard deviation of 2. The correlation between NPI-16 scores and number of Facebook friends was r = .1. Compute the lower limit of the 95% confidence interval for b for the regression equation that predicts NPI-scores from number of Facebook friends.

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