1. Section 2

2. Descriptive statistics  the methods of organizing & summarizing data Create a graph If the sample of high school GPAs contained 10,000 numbers, how could the data be described or summarized? State the range of GPAs Calculate the average GPA

3. Inferential statistics  involves making generalizations from a sample to a population Based on the sample, if the average GPA for high school graduates was 3.0, what generalization could be made? The average national GPA for this year’s high school graduate is approximately 3.0. Could someone claim that the average GPA for PISD graduates is 3.0? No. Generalizations based on the results of a sample can only be made back to the population from which the sample came from. Be sure to sample from the population of interest!!

5.  listable set of values  usually counts of items

6.  data can take on any values in the domain of the variable  usually measurements of something

7. Suppose that the PE coach records the height of each student in his class. Univariate - data that describes a single characteristic of the population This is an example of a univariate data

8. Suppose that the PE coach records the height and weight of each student in his class. Bivariate - data that describes two characteristics of the population This is an example of a bivariate data

9. Suppose that the PE coach records the height, weight, number of sit-ups, and number of push-ups for each student in his class. Multivariate - data that describes more than two characteristics (beyond the scope of this course) This is an example of a multivariate data

10. 1. the appraised value of homes in Plano 2. the color of cars in the teacher’s lot 3. the number of calculators owned by students at your school 4. the zip code of an individual 5. the amount of time it takes students to drive to school Discrete numerical Continuous numerical Categorical Is money a measurement or a count?

12.  refers to data in which both sides are (more or less) the same when the graph is folded vertically down the middle  bell-shaped is a special type has a center mound with two sloping tails

13.  refers to data in which every class has equal or approximately equal frequency

14.  refers to data in which one side (tail) is longer than the other side  the direction of skewness is on the side of the longer tail

15.  refers to data in which two (or more) classes have the largest frequency & are separated by at least one other class

16. Chapter 1.2 Assignment