BA 275 Quantitative Business Methods

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Presentation transcript:

BA 275 Quantitative Business Methods Agenda Summarizing Quantitative Data Descriptive Statistics Box and Whisker Plot Quiz #1 Announcement Check your COB email account for any latest update. CyberStats Tech support: 1 – 888 – 281 – 2990 1 – 800 – 423 – 0563 TA: Shen. 8:00 – 9:50 am, Friday at 328 Bx.

Statistical Analysis

Types of Data Numerical (Quantitative) Data Regular numerical observations. Arithmetic calculations are meaningful. Age Household income Starting salary Categorical (Qualitative) Data Values are the (arbitrary) names of possible categories. Gender: Female = 1 vs Male = 0. College major

Summarizing Quantitative Data (p.4)

Summarizing Quantitative Data: Histogram

Histogram vs. Barchart Histogram applet

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Summarizing Quantitative Data: Summary/Descriptive Statistics AGE SALARY ---------------------------------------------- Count 60 60 Average 51.4667 403.883 Median 50.0 350.0 Mode 50.0 Variance ? 47815.6 Standard deviation 8.92239 ? Minimum 32.0 21.0 Maximum 74.0 1103.0 Range 42.0 1082.0 Lower quartile 45.5 ? Upper quartile 57.0 539.5 Interquartile range ? 289.5 ---------------------------------------------

Percentiles for Salary