Suppose that the amount of time customers spend in line at Chipotle before receiving their food is known to be normally distributed. The manager wants to construct a confidence interval for the true mean waiting time, so she collects waiting time data from a random sample of 15 individuals. Are the necessary conditions met to construct a valid confidence interval?
1.Yes, the sample is randomly selected and the population distribution of waiting times is normally distributed.
2.No, since we do not have enough information to check the conditions for a valid confidence interval.
3.We cannot say because we are not slven to compute np and n(1-P)
4.No, although the sample is randomly selected, the sample size is less than 30,