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(5) The time ( in minutes) to fill out the teacher evaluation form for the course were as follow: 18 19 1218 2015 17 19 23 30 21 164417 15 12 18 26 19 122322 35 16 Make a relative frequency histogram with 5 classes, show class boundaries

math   Statistics-And-Probability   
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(a) The time (in minutes) to fill out the teacher evalulati on form for the course were as follows The formula for calculating the range is Range -Maximum - Minium - 44-12 - 32 Range 32 Therefore, the class width for a frequency table with five classes is Range Number of classes Class width - 32 6.4 Class width 7 The class limits for a frequency table with seven classes is Class interval frequency relative frequency- 12-19 19- 26 26-33 33-40 40-47 0.625 0.25 0.041667 0.041667 0.041667 2f 24

(b) The step-by-step instructions to obtain a Relative frequency Histogram using Excel2010 * Store the data in the Excel2010 worksheet Select the range of the relative frequency column t Choose Column chart ->2D- column Choose Design -Chart Layouts ->Layout8 ->Style38 * Click ok. The Relative Frequency Histogram

The relative frequency histogram 16 14 12 E 10 4 0 12-19 19-26 26-33 33-40 40-47 Class interval

Interpretation:

The relative frequency histogram illustrates about the distribution is right skewed distribution, since the mean is greater than the median. The distribution of time(min) is right skewed distribution.

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