A biologist examines 17 seawater samples for magnesiumconcentration. The mean magnesium concentration for the sample datais 0.252 cc/cubic meter with a standard deviation of 0.074.Determine the 80% confidence interval for the population meanmagnesium concentration. Assume the population is approximatelynormal. Step 1 of 2: Find the critical value thatshould be used in constructing the confidence interval.Round your answer to three decimal places.
