A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high school seniors. The study examined the scores of a random sample of 136...

A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high school seniors. The study examined the scores of a random sample of 136 graduating seniors and found the mean score to be 474 with a standard deviation of 112. Determine a 95% confidence interval for the mean, rounding all valuesto the nearest tenth.