Hello! Can you help me to solve question 4? Thank you

ZOOM + (b) Find the mean and standard deviation of the sampling distribution of X for a random sample of size n - 100. Interpret the results. (c) Repeat part b for n = 400. Describe the effect of increasing n. 4. Consider duration of mobile phone calls of a P6 student. It is assumed to follow a distribution with mean # - 2.8 minutes and standard deviation o - 2.1 minutes. From a random sample of 45 calls, the parents of this student computed a sample mean of X - 3.3 minutes and a sample standard deviation of s - 2.9 minutes. (a) What are the mean and standard deviation of the data distribution? (b) Find the mean and standard deviation of the sampling distribution of the sample mean. (c) Is the mean of 3.3 minutes from the collected sample unusually high? Find its z-score and comment. (d) The parents have told this student that they will re-plan (to tighten phone use) when they find a sample mean larger than 3.5 minutes. How likely is it to happen? O P R 25.C Partly sunny ~ 03 x (7 ()