The normal distribution plays an important role in statistics. Write a brief description on each of the following aspects: i) the key features of a normal distribution; ii) two variables which occur naturally as a normal distribution; iii) a variable where you would prefer to use the median as the measure of central tendency.

If a data set has 15 mean standard daviation 2 , percentage observation lie between 13 and 17

Which of the following is NOT an example of cross-sectional data?

Think of your own example of a data set that would follow a normal distribution and explain why.

Statistics that describe typical scores are called:   Select one: a. Models b. Standard deviations c. Z scores d. Measures of central tendency

find an example of when statistics were misused/skewed and state the reason why you think the statistics were reported that way.

Draw the box-and-whisker plot and give the five-number summary for each data set. Number of games won by the Detroit Lions in their last 10 seasons:                                                      minumim:________            (9,7,11,7,4,10,6,2,0,7)                                                                                                                 Lower Quartile:________                                                                                                                                                                  Median:______________                                                                                                                                                        Upper Quartile:_____________                                                                                                                                                         Maximum_______________

These data are the number of on-campus burglaries reported in a given year for nine western Pennsylvania universities. 16 10 4 16 9 8 12 5 16 For the above data set, find the mean, median, midrange, and mode. Round to one decimal place, if necessary.

Over the first five years of owning her car, Gina drove about 12,700 miles the first year, 15,478 miles the second year, 12,675 the third year, 11,850 the fourth year, and 13,075 the fifth year. a. Find the mean, median, and mode of this data. b. Explain which measure of central tendency will best predict how many miles Gina will drive in the sixth year. a. mean= 12,700; median= 13,156; no mode; the mean is the best choice because it is representative of the entire data set. b. mean= 13,156; median= 12,700; mode= 3,628; the median is the best choice because it is not skewed by the high outlier. c. mean= 13,156; median= 12,700; no mode; the mean is the best choice because it is representative of the entire data set. d. mean= 13,156; median= 12,700; no mode; the median is the best choice because it is not skewed by the high outlier.

Which of these is an advantage of using a transformed score when reporting the score of an individual case? a. Transformed scores will allow the mean score to be reported. b. Transformed scores will be reported on the nominal level. c. Transformed scores provide a context for the individual's score d. Transformed scores provide a measure of variability.