Regression Analysis Review of Statistical Concepts PDF

REGRESSION ANALYSIS Pre-class TOPICS: INSTRUCTOR: Types of Data Types of Tests Donna Mabell Palo Hypothesis Testing Concepts DATA & TESTS TYPES OF DATA...

REGRESSION ANALYSIS Pre-class TOPICS: INSTRUCTOR: Types of Data Types of Tests Donna Mabell Palo Hypothesis Testing Concepts DATA & TESTS TYPES OF DATA 3 TYPES OF VARIABLES 4 TYPES OF VARIABLES 5 LEVELS OF MEASUREMENT NOMINAL ORDINAL INTERVAL measured along a numerical scale and has equal intervals between adjacent values but has no true zero point (e.g. temperature) RATIO same as interval but has a true zero point, a point where zero means the absence of something (e.g. number of staff) 6 TYPES OF TESTS 7  REVIEW OF HYPOTHESIS TESTING HYPOTHESIS TESTING 9 STEPS IN HYPOTHESIS TESTING (USING STATISTICAL TABLES) 10 STEPS IN HYPOTHESIS TESTING (USING SOFTWARE) 11 TWO TYPES OF HYPOTHESIS 12 TWO TYPES OF HYPOTHESIS 13 ONE-TAILED vs TWO-TAILED TEST BASIS OF COMPARISON ONE-TAILED TEST TWO-TAILED TEST Meaning A statistical hypothesis test in which alternative A significance test in which alternative hypothesis has only one end, is known as one hypothesis has two ends, is called two-tailed tailed test. test. Hypothesis Directional Non-directional Region of rejection Either left or right Both left and right Determines If there is a relationship between variables in If there is a relationship between variables in single direction. either direction. Result Greater or less than certain value. Greater or less than certain range of values. Sign in alternative > or < ≠ hypothesis 14 LEVEL OF SIGNIFICANCE 15 TWO TYPES OF ERROR 16 TWO TYPES OF ERRORS 17 P-VALUE 18 CRITICAL REGION 19 DECISION RULES 20 DECISION RULES 21 DECISION RULES 22 TEST STATISTIC 23 STATISTICAL DECISION 24 Thank you!