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Mancosa Statistical techniques exam practice
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1. Determine the range from the data in the table.
2. Group the data in a frequency distribution with a lowest class
lower limit of 10 faulty ATMs and a class width of 10 faulty ATMs.
3. From the grouped frequency distribution, determine the
following (number of faulty ATMs over the 20-day period): (i)
mean. (ii) median. (iii) mode.
4. Determine the standard deviation and interpret its value.
5. Draw an ogive curve and use it to estimate the median.
6. What type of data (discrete or continuous) is portrayed in the
table? Explain.
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