Cloudiness in Breslau. In the paper “Cloudiness: Note on a Novel Case of Frequency” (Proceedings of the Royal Society of London, Vol. 62, pp. 287–290), K. Pearson examined data on daily degree of cloudiness, on a scale of 0 to 10, at Breslau (Wroclaw), Poland, during the decade 1876–1885. A frequency distribution of the data is presented in the following table.

Degree Frequency Degree Frequency 0 751 6 21 1 179 7 71 2 107 8 194 3 69 9 117 4 46 10 2089 5 9

a. Draw a frequency histogram of these degree-of-cloudiness data.

b. Based on your histogram, do you think that degree of cloudiness in Breslau during the decade in question is approximately normally distributed? Explain your answer.