Statistics Solutions

[See Solution] Represent engineering data in tabular and graphical form. Determine measures of central tendency and dispersion The masses of 50 castings

Question: Represent engineering data in tabular and graphical form. Determine measures of central tendency and dispersion

The masses of 50 castings were measured. The results in kilograms were as follows

4.6 4.7 4.5 4.6 4.7 4.4 4.8 4.3 4.2 4.8
4.7 4.5 4.7 4.4 4.5 4.5 4.6 4.4 4.6 4.6
4.8 4.3 4.8 4.5 4.5 4.6 4.6 4.7 4.6 4.7
4.4 4.6 4.5 4.4 4.3 4.7 4.7 4.6 4.6 4.8
4.9 4.4 4.5 4.7 4.4 4.5 4.9 4.7 4.5 4.6
  1. Arrange the data in 8 equal classes between 4.2 and 4.9 kilograms.
  2. Determine the frequency distribution.
  3. Draw the frequency histogram and frequency polygon.
  4. Calculate the mean, median and interquartile range.
  5. Calculate the standard deviation for the data. You may wish to use a coded method.
  6. Calculate the limits within which you would expect (i) 95% and (ii) 99% of components to fall.

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Solution: The downloadable solution consists of 6 pages
Deliverable: Word Document


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