NAEP music scores. In Exercise 1.101 (page 61) we examined the distribution of NAEP scores for the twelfth-grade reading skills assessment. For eighthgrade students the average music score is approximately Normal with mean 150 and standard deviation 35. (a) Sketch this Normal distribution. (b) Make a table that includes values of the scores corresponding to plus or minus one, two, and three standard deviations from the mean. Mark these points on your sketch along with the mean. (c) Apply the 689599.7 rule to this distribution. Give the ranges of reading score values that are within one, two, and three standard deviations of the mean.
Statistics for Business and Economics The Science of Statistics Collecting, classifying, summarizing, organizing, analyzing and interpreting numerical and categorical information. Sampling: A process of selecting data from larger sets of data whose characteristics we wish to estimate. Statistics: -Describing sets of data -Drawing conclusions about sets of data on sampling basis Descriptive Statistics: uses numerical and graphical methods to explore data (i.e. patterns, create a more convenient way to present info) Inferential Statistics: uses sample data for estimates, generalizations etc. The main difference between these two is that DS is to present patterns of a data set conveniently; no analysis. IS is to present analysis results using probability t
