Frequency and standard deviation.
1. For a dataset, without constructing of the frequency distribution table; how to obtain the class width of frequency distribution table if the number of classes is given? (2pts) Note: Use the formula in the slides; here frequency distribution table is not provided.
2. Explain the difference between a frequency distribution table and a relative frequency distribution table (4pts)
3 1. Explain the difference between mean and median. Is mean always larger than median? (4pts)
2. Explain the difference between µ and x . How do you determine which is appropriate to use in a problem? (4pts)
3. Explain the difference between σ and s. How do you determine which is appropriate to use in a problem? (4pts)
4. What is the relationship between variance and standard deviation? (2pts) 2
5. Explain the difference between range and interquartile range. (4pts)
6. Explain what the coefficient of variation is. What is the advantage of using it compared to standard deviation? (4pts)