Let X1, . .., X25 be a random sample from a normal distribution with unknown mean & and known variance of = 100. A sample x1, ..., 25 is collected and the sample mean from this sample is calculated to be x = 4. Based on this sample, a 95% confidence interval for / is Select one: O (0.08,7.92) O (0,4) O (0, 00) O (4,10)