Question: Be sure to determine correctly whether the confidence intervals are calculated with the normal distribution or the t distribution. In a study relating physical attractiveness

Be sure to determine correctly whether the confidence intervals are calculated with the normal distribution or the t distribution.
In a study relating physical attractiveness and mental disorders, 231 subjects were rated for attractiveness. The resulting sample mean and standard deviation for that variable were 3.94 and 0.75, respectively. Use these sample data to construct the 95% confidence interval for the population mean.

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