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### 42 Cards in this Set

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 A set of procedures used to analyze data Statistics The actual result at the end of the procedure Statistic Summarize, organize, and simplify data Assign numbers to answers to better organize data Descriptive Statistics A small percentage you are interested in Inferential Statistics Measurements or observations Data Collection of information (all data) Data Set The group of all people of interest Population A representative group (that represents a larger group) Sample Characteristics or conditions that change and have different values for different people Variable The variable that receives treatment or changed in some way Independent Variable The variable that is measured Dependent Variable Anticipated outcome of the study What you think will happen ****Theory**** Hypothesis Score X a.)Number of scores (population) b.) Number of scores (sample) a.) N b.) n Summation Σ Using 2, 4, 4, 5, solve. ΣX = ? ΣX = 15 Using 2, 4, 4, 5, solve. (ΣX) + 2 = ? Σ (15) + 2 = 17 Using 2, 4, 4, 5, solve. Σ (X + 2) = ? Σ (2+2)+(4+2)+(4+2)+(5+2) (4) + (6) + (6) + (7) = 23 Using 2, 4, 4, 5, solve. (ΣX)^2 = ? Σ (15)^2 = 225 Using 2, 4, 4, 5, solve. Σ (X^2) = ? Σ (2^2)+(4^2)+(4^2)+(5^2) (4) + (8) + (8) + (25) = 61 The most frequently occuring X (score) Mode Divides exactly in half Median Average Mean Solve for 2, 4, 4, 5. a.) Mode b.) Median c.) Mean a.) 4 b.) 4 c.) 3.5 Solve for 2, 4, 4, 5, 5, 6. a.) Mode b.) Median c.) Mean a.) 4, 5 b.) 4.5 c.) 4.33 Steps to solve. 1.) Rank Order 2.) ΣX 3.) N How many times each number appears in the data set Frequency (f) what proportion represented by each score Proportion (p) What is the other information also used in the histogram? Percentage (%) Distance between the highest score and the lowest score Highest - Lowest Range Locate P50, think of them as two datasets Interquartile Range (IQR) Semi-Interquartile Range (SemiIQR) Named categories in no particular order (ex. Eyes color : green, blue, brown) Nominal (MODE) Ranked Data (ex. 1st, 2nd, 3rd) Ordinal (MODE, MEDIAN) Equal Between NO TRUE ZERO (ex. IQ, temperature) Add & Subtract Interval(MODE, MEDIAN, MEAN) Equal Intervals; TRUE ZERO (ex. \$0 in bank account or pocket) Add, Subtract, Multiply, & Divide Ratio(MODE, MEDIAN, MEAN) Used in most research, assign or code numbers to your data, and then use statistical analysis Quanitive Data More Narrative Data Qualitive Data Histogram info X f p % * * * * * 1 2 3 4 5 Symmetrical * * * * * 1 2 3 4 5 Postively skewed * * * * * 1 2 3 4 5 Negatively skewed Info for graph F r e q S c o r e s