1. Answer what is asked for in the following problems: a. A set of data has 50 observations. How many classes would you recommend? b. A set of data consists of 150 observations. How many classes will...

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Extracted text: 1. Answer what is asked for in the following problems: a. A set of data has 50 observations. How many classes would you recommend? b. A set of data consists of 150 observations. How many classes will you recommend? C. In a set 60 observations between 20 and 70, how many classes will you recommend? What is the class interval? d. A survey was conducted to 100 students to determine how much time they spend for studying before taking a major examination. The observations are between 90 and 270 minutes. How many classes will you recommend? What is the class interval? e. A sari-sari storeowner monitors his daily sales for a period of 30 days. The following are his daily sales: 560 960 260 900 700 1020 370 940 340 400 795 240 200 390 100 500 890 900 250 450 1010 650 800 450 250 450 890 695 749 360