The manager at BIG JIMS restaurant is concerned about the time it takes to process credit card payments at the counter by counter staff . The manager has collected the following processing time data (time in minutes/seconds) (Table 2.21) and requested that summary statistics are calculated.

(a) Calculate a five-number summary for this data set.

(b) Do we have any evidence for a symmetric distribution?

(c) Use the Excel Analysis-ToolPak to calculate descriptive statistics.

(d) Which measures would you use to provide a measure of average and spread?

Transcribed Image Text:

1.57 1.09 1.13 1.49 0.98 0.76 1.40 0.76 Table 2.21 1.38 1.29 1.59 1.73 2.31 1.23 1.89 1.54 Processing credit cards (n = 40) 1.97 1.26 0.27 0.79 1.23 1.56 0.89 1.78 1.52 1.07 0.92 1.38 1.56 1.98 1.34 4.89 1.39 1.76 0.71 2.46 0.89 2.01 3.21 1.98