92.The degrees of freedom for the sample variance
Short Answer practice items from all chapters (remember: This is just to help you learn the material. The exams only contain multiple choice items.93.Define the median.94.(4 pts) A researchers measures the following heights (in inches) of CEO's selected at random: 72, 75, 75, 66, 64, 79, 79, 75, 70, 72, 75, 77, 77, 74. Which measure of central tendency is most appropriate for describing these data? Why? (Hint: Draw the shape of this distribution first).95.(2 pts) Describe SS (Sum of squares) in words. (Be sure you are complete, including all parts of this definition).96.(2 pts) When can variability be negative?97.Give the definition of variance in words.98.(4 pts) Distinguish between descriptive and inferential statistics.99.What is the definition of an operational definition?100.(4 pts). Explain why the sample variance and population variance are computed differently.101.According to the empirical rule, for data that are normally distributed, at least _______% of data lie within 2 standard deviations from the mean.102.Why is the variance a preferred measure of variability?103.Why is the mean a preferred measure ofcentral tendency?