Question

Describe how the presence of possible outliers might be identified on the following. (a) histograms higher center bar than surrounding bars gap between the first bar and the rest of bars or between the last bar and the rest of bars gap around the center of the histogram O large group of bars to the left or right of a gap higher far left or right bar than surrounding bars (b) dotplots large groups of data to the left or right of a gap large gap around the center of the data large group of data on the left or right of the dotplot • large gap between data on the far left side or the far right side and the rest of the data large group of data in the center of the dotplot (c) stem-and-leaf displays large group of data in the center stems large group of data near a gap • several emoty stems in the center of the stem-and-leaf display

Answer 1

1. Correct

2. Expected number = 186*0.72 = 133.92

Standard deviation = √186*0.72*(1 - 0.72) = 6.12