Suppose you have 36 observations, the smallest and largest of which are 130.1 an

Question

Suppose you have 36 observations, the smallest and largest of which are 130.1 and 311.8, respectively. Apply the accompanying procedure to choose classes for cutpoint grouping. Use eight classes. Choose the class width by rounding the calculated approximate class width up to the nearest multiple of 5. Choose the lower cutpoint of the first class by rounding the minimum observation down to the nearest multiple of 5. 1 Click the icon to view the procedure for choosing classes. Classes for cutpoint grouping -under -under -under -under -under -under [ ] -under L1 -under (Use ascending order.)

Explanation / Answer

Answer to the question is as follows:

130.1 to 311.8 have to divided into 8 classes

So, width . of buckets = (311.8-130.1)/8 = 22.7125 or 25 is the bucket width ( rounding off to nearest 5 multiple)

The lowest cutpoint is nearest 5multiple near 130.1 i.e. 130

Now,

130-under 130+25 --> 130- under 155 ( since we have to round off 130.1 to 130 and 153 to 155)

155-under 155+25 --> 155- under 180

180-under 180+25 --> 180- under 205

205-under 205+25 --> 205- under 230

230-under 230+25 --> 230- under 255

255-under 255+25 --> 255- under 280

280-under 280+25 --> 280- under 305

305-under 305+25 --> 305- under 330

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