How many rounds of golf do those physicians who play golf play per year? A survey of 12 physicians revealed the following numbers:   7,38,13,4,31,35,21,14,19,25,13,54   Estimate with 93% confidence the mean number of rounds played per year by physicians, assuming that the population is normally distributed with a standard deviation of 6. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.