Introduction to Stat Formula Sheet

# Introduction to - STAT 100 ToQics Covered on Test 1 I Population vs Sample Parameters vs Statistics How to choose a Simple Random Sample using the

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STAT 100 ToQics Covered on Test 1 I. Population vs. Sample Parameters vs. Statistics How to choose a Simple Random Sample using the Random Number Table TI. Descriptive Statistics A. Qualitative Data Bar Chart, Pie Chart, Clustered Bar Chart B. Quantitative Data 1. Measures of Central Tendency (or Location) a. Mean (average) f.J or x b. Median (middle value) M or m c. Mode (most frequent value) d. Trimmed Mean 2. Measures of Variability (or Spread) a. Range (max-min) b. Variance az or SZ c. Standard Deviation a or s d. Interquartile Range IQR = Q3 - Q, 3. Measures of Relative Standing a. Percentiles 1. If rn is a whole number, then Pris the average of the data value in that position and the next position. 2. If rn is not a whole number, then Pris the data value in the next whole number position. b. Quartiles 1. Q, = PZ5 2. Qz = P5o 3. Q3= P75 - Z observation -mean Xi - X c. -score = - standard deviation s 4. Graphing Quantitative Data a. Dotplot b. Stem-and-IeafPlot (including split stem, back-to-back and

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## This note was uploaded on 04/22/2008 for the course STAT 100 taught by Professor Addelstein during the Fall '07 term at UConn.

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Introduction to - STAT 100 ToQics Covered on Test 1 I Population vs Sample Parameters vs Statistics How to choose a Simple Random Sample using the

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