Chapter 17 Statistical Methods Test Questions 1. What is meant by the phrase: the central tendency of the data? How are these values used? 2. What is meant by the phrase: measures of dispersion? How are these values used? 3. Calculate the mean, mode, and median of the following information: 48.1, 48.2, 48.1, 48.3, 48.4, 48.5, 48.1, 48.3. 4. Calculate the mean, range, and standard deviation of the following numbers: 300, 440, 275, 350. Calculate the mean, range, and standard deviation of these numbers: 350, 470, 300, 360. 5. To create a paper clip, wire is cut to 4 " lengths and then formed into the shape we are all familiar with. Use the following information to create a histogram. Show all formulas and appropriate calculations. Size Frequency 3.8 39 4.0 4.1 4.2 43 6. Describe how the mean, mode, median, range and standard deviation work together to describe the data presented in a histogram. 7. One of the dimensions measured when filling bottles of olive oil is the depth of the cork in the bottle. Since the depth of the cork in the bottle affects the size of the air gap in the bottle, this dimension is critical. Its specification is 48.5 +/- 0.5 mm. During a recent day, 35 bottles were inspected for the depth of the cork in the bottle. Create and interpr a histogram using the following information