The production manager of a continuous process plant has been given his weekly production targets
The production manager of a continuous process plant has been given his weekly production targets. The following data shows his weekly production as a percentage of his targets. Fifty weekly figures are consistent with a two-week closure at Christmas. A value below 100 shows a production shortfall. A value above 100 shows the week’s target have been exceeded.
91 | 96 | 118 | 88 | 106 | 92 | 113 | 111 | 98 | 109 |
87 | 108 | 100 | 100 | 92 | 98 | 99 | 108 | 108 | 97 |
94 | 111 | 102 | 103 | 88 | 94 | 93 | 99 | 91 | 105 |
103 | 96 | 93 | 77 | 98 | 99 | 100 | 102 | 103 | 104 |
106 | 97 | 104 | 96 | 100 | 103 | 102 | 94 | 93 | 94 |
- With the aid of a suitable grouped cumulative table draw an ogive of this data.
- Draw a suitable histogram for the data.
- Use the histogram to estimate the mode of the data.
- the mean and standard deviation
- Estimate the mean (State the 95% confidence limits) and standard deviation of the population, Stating any assumptions made.
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