# Dependent variable continuous mark in o independent

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Dependent variable – continuous: Mark in % o Independent variable – discrete: class attendance (Yes; No; sometimes) Do a hypothesis test o 1 sample t test: 1 input variable and 1 level Use the Statistical analysis road map for step 8, 9 & 10 All use p value (sig); decisio n is always based on p value Downloaded by:: bryce0736 | [email protected] Distribution of this document is illegal

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Stuvia.com - The study-notes marketplace o 2 sample t test: 1 input variable and 2 levels (2 samples of yes and no) o ANOVA: 1 input variable and 2+ levels o Correlation regression: test my ratios against one another [ y = m x + c ¿ [ m = rise run ] Draw a graph of results (use trend line) Ho = no relationship Ha = there is a relationships P value tells us if there is or isn’t a relationship Use R 2 EXTRA CLASS EXAMPLES: Case study with the descriptive statistic: Location (central tendency) mean median and mode Spread: Range; standard deviation/ variance Shape Consistency: upward or downward tendency (if the case study gives it to you) EXAMPLE 1: SAMPLE 1: (rice crispys) Mean = 6 Median = 8 Standard Deviation = 2 SAMPLE 2: (cornflakes) Mean = 9 Median = 6 Standard deviation = 5 Describe the data using descriptive statistics. The mode is not given; sample not given to me therefore choose own sample when feel it is needed. Mean and median are different; o Sample 1: the mean is 6 and the median if 8 therefore mean < median therefore skewed to right. In this case people prefer cornflakes to rice crispys. Downloaded by:: bryce0736 | [email protected] Distribution of this document is illegal
Stuvia.com - The study-notes marketplace 6 8 o Sample 2: the mean is 9 and the median is 6 therefore mean > median therefore skewed to the left. In this case people prefer cornflakes to rice crispys. 6 9 Standard deviation: o Sample 1: standard deviation is 2 and median is 8 [8 plus 2 o Sample 2: standard deviation is 5 and median is 6 Most of the data lies between 95% (always use) and 68% (always use) -1 Std +1 Downloaded by:: bryce0736 | [email protected] Distribution of this document is illegal

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