A random variable is normally distributed. You take a sample of 13 observations of the random variable and find a sample mean of 12 and a sample standard deviation of 7. Using the t-distribution to compensate for the fact that your mean and standard deviations are sample estimates, find the probability of the random variable taking on a value between 0 and 4. Round your final answer to three decimal places. Multiple Choice a. 0.194 b. 0.138 c. 0.056 d. 0.082 e. 0.571