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# Measure of central tendency and dispersion

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Measure of central tendency and dispersion allow researchers to analyze data more effectively. A quick serve restaurant chain commissioned a research study on the introduction of a new salad product. The survey asked the respondent for an assessment of the new salad. The questions included a rating from 0 (lowest) to 10 (highest) on several attributes of the new product. A rating of 8.0 and above is considered to be the goal. The following selected results were from a sample of 759 respondents:
Portion Size (8.01/1.81)
Overall Appearance (8.79/1.02)
Overall Freshness (8.80/0.85)
Value for Money (7.51/1.85)
Amount of Ingredients (7.36/1.76).

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The solution discusses the measure of central tendency and dispersion.

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A survey has been conducted for an assessment of a new salad by a quick serve restaurant chain in which a sample of 759 respondents have been asked to give ratings from 0 (lowest) to 10 (highest) on several attributes of the new product.
The mean rating for the portion size of the salad is 8.01which is above the required goal of 8.0. The standard deviation of the rating for portion size is 1.81. The high value of the standard deviation as compared to the mean indicates considerable amount of dispersion in the rating for portion size of the salad. In ...

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• MSc, Osmania University
• MSc, Indian Institute of Technology - Roorkee (I.I.T.-ROORKEE)
• BSc, Banaras Hindu University
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