Question

This Question: 1 pt 13 of 20 (17 complete) This Test: 20 pts p Use the given minimum and maximum data entries, and the number of classes, to find the class width, the lower class imits, and the upper cliass limts minimum 18, maimum The ciass width is (Type a whole umber.) 128, 8 classes Choose the correct lower class limits below OA, 18, 32, 46, 50, 74、88, 102, 116 O B. 32, 45, 60, 74, 8s, 101, 115, 129 O c. 18, 31, 46, 59, 73-88, 101, 116 O D. 31, 45, 60, 73, 87, 101, 116, 129 Choose the correct upper class limits below O A. 32, 46, 60, 74, 88, 101, 116, 129 O B. 31,45, 59, 73, 87. 101, 115,129 O C. 32, 46, 59, 73, 38, 101. 116, 129 O D. 31, 45, 60,74, 87, 101. 115, 129 Click to select your answers) Lecture 2.2 19F Calculator Skils Correlation and Regression-T 38 @農

Answer 1

The class width is defined as -

$d = \frac{Maximum-Minimum}{Number \:\: of\:\: Classes}$

So, for maximum = 128, minimum = 18 and number of classes = 8, we get -

$d= \frac{128-18}{8} = 13.75 \approx 14$

So, approximate class width = 14

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Thus the lower limits would be: 18, (18+14), (18+(2*14)),.............,(18+(7*14))

Or, option (A): 18, 32, 46, 60, 74, 88, 102, 116

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And thus the upper limits would be -

(B): 31,45,59,73,87,101,115,129