In: Statistics and Probability
Suppose now that Maria takes a new random sample of a different size.
She computes the resulting 96% confidence interval to be (2.33, 2.75) oz. It is known that the distribution of the amount of ice cream it takes for all Maria's customers to get a brain freeze is symmetric, unimodal, and has a standard deviation of 1.6 oz.
Calculate the sample size used to compute the above confidence interval. Report your answer as a number (no symbols), and round up to the nearest integer (whole) number.