MAT 312

. . . PENNIES for the AGES. . .

Push the “Sample More Data” button on the screen and read the average age of a sample of 9 pennies taken from the jar.

Note the horizontal and vertical scales on the grid here and then record that (rounded) average age using a properly scaled X.

Thursday, February 13, 2014

Prob & Stat (MAT 312)Dr. Day Thursday February 13,

2014 Grab 9 Pennies at Random then Calculate and Plot Their

Average Age

Return Quiz #1; Update on Assignment #3

Continue: Data Representations Box-and-Whiskers Plots

Review Process and Components Calculator Connections

Measures of Spread

Putting it all Together: Characteristics of 1-Variable Data Center/Location Spread (Variation/Deviation) Shape

Quiz #2 (Test #1 prep)Thursday, February 13, 2014

MAT 312

MAT 312Thursday, February 13, 2014

For which company would you prefer to work?

This is a random sample of 10 salaries from each of the two companies.

MAT 312Tuesday, February 11, 2014

Which school had the better test scores?

Scores from a common test given to 10 students at each of two schools.

MAT 312Tuesday, February 11, 2014

MAT 312Tuesday, February 11, 2014

MAT 312Tuesday, February 11, 2014

MAT 312Tuesday, February 11, 2014

MAT 312

Return Quiz #1 with Comments/Solutions

Quiz #2 (Test #1 prep) today! Quiz #3 next Tuesday

Test #1: Thursday, Feb 20: 1-Variable Data Analysis (Chs 1-3) All material through Tuesday, Feb 18 Website Resources Two parts to the test

Multiple Choice Open Response

Assignments

Thursday, February 13, 2014

MAT 312

Initial Steps: 1-Variable Data Analysis

Clusters are isolated groups of points.

Gaps are large spaces between data points or between clusters of data points.

Outliers are data values substantially larger or smaller than any other data points.

The maximum value of a data set is the largest value in the set. It is also called the upper extreme.

The minimum value of a data set is the smallest value in the set. It is also called the lower extreme.

The range of a data set is the difference between the maximum and minimum values of a data set.

The mode of a data set is the value that occurs most often in the data set. A data set can have more than one mode, and if no data value occurs more often than any other, there is no mode.Thursday, February 13, 2014

MAT 312

Representing DataDisplay Summary

Visual

Line Plot (Dot Plot)

Stem-and-Leaf Plot

Scatter Plot

Circle GraphBar GraphHistogram

Box-and-Whisker Plot

Numerical

Raw DataOrdered ListFrequency

Table

Measures of Center(mean, median, mode)

Measures of Spread(range, deviations,

variance)Markers of Locations

(percentiles, 5-number summary)

Thursday, February 13, 2014

MAT 312Thursday, February 13, 2014

MAT 312Thursday, February 13, 2014