Guideline : Eastern States Bank and Trust monitors its drive-thru service times electronically to ensure that its speed of service is meeting the company's goals. A sample of 28 drive-thru times was recently taken and is shown below in the table named "Speed of Service".

Speed of Service (time in seconds)
83	120	145	120
130	79	129	156
90	85	68	93
120	76	73	110
92	146	88	103
116	110	120	71
109	110	105	74

1. Using Excel, compute the mean, median, and mode for these sample data.

2. Using the values of the mean, median, and mode you calculated above, can you confirm whether the data are symmetrical or skewed? Explain how you came to your answer - you would need to create a "normal distribution curve graph" or "histogram with normal distribution overlay" for this question (feel free to manually draw this curve or use any other app to create the graph). Please provide your answer in the space highlighted.

3.Construct a box and whisker plot for the sample data using excel (this answer needs you to have a box and whisker plot drawn using EXCEL). Does the box and whisker plot support the conclusion you made in question 2 in part b (regarding the symmetry or skewedness of the given data set)? Explain your answer.