BA 578 Assignment-Sol- due by Midnight (11:59pm) Sunday, Feb 2nd , 2014(Chapters 1, 2, 3 and 4): Total 75 points (You have to show your work in Essay type questions but not in T/F or Multiple choice questions)
True/False (One point each)
1. The number of people eating at a local café between noon and 5:00 p.m. is an example of a continuous variable. FALSE
2. An example of a nominal scale variable is the make/model of a car. TRUE
3. Credit score is an example of an ordinal scale variable. FALSE It is an interval scale variable where differences make sense but ratios do not make sense.
4. An example of a nominal scale variable is the telephone number of an individual. TRUE
5. When establishing the classes for a frequency table it is generally agreed that the more classes you use the better your frequency table will be. FALSE We try to follow the 2k rule. Having too many classes is not good.
6. The cumulative distribution function is initially increasing then decreasing. FALSE It is always increasing and becomes flat at the end point.
7. A Histogram is a graphic that is used to depict quantitative data. TRUE Bar Chart is used for qualitative data.
8. The Mean is the measure of central tendency that divides a population or sample into two equal parts. FALSE The Median does that.
9. If there are 9 classes in a frequency distribution then the fifth class must contain the median. FALSE It depends on the class frequencies
10. The sum of deviations from the mean can be negative or positive. FALSE It is always zero.
11. The median is said to be less sensitive to extreme values. TRUE This statement is a relative statement (implicitly) comparing Median with the other popular measure of central tendency, namely, the Mean. But some students read the statement in absolute terms and answered it wrong although they knew that Median is not sensitive to extreme values. Therefore, I removed this question from grading.