Question

Answer the following questions about the dataset below and SHOW YOUR WORK.

Dataset: Exam 2 scores of MKT2300 class are given below

80, 52, 69, 78, 34, 67, 99, 76, 67, 56, 68, 78, 77, 79

1. What’s the mean?
2. What’s the median?
3. What’s the mode?
4. What’s the variance?
5. What’s the standard deviation?
6. What’s the range?
7. If Jake took a makeup exam and got a 84.8 from this exam, what is his z score? (use the mean and the standard deviation calculated in part a and e).
8. What does this z score tell us in terms of Jake’s standing in the class?
9. What percentile does Jake rank in the class?

A survey (N=256) revealed that the yearly average spending of Wayne State University students is $6000 with a standard deviation of $160. Estimate the population mean with a 95% level of confidence. In other words, compute a range such that you are 95% confident that this range will include the true population parameter. (Z value for a 95% level of confidence is ± 2.58)

Answer 1