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C784: Formulas
Applied Healthcare Statistics These are the main formulas and unit conversions we recommend focusing on. You will have to memorize all formulas for the objective assessment. Module 2: Commonly Used Metric Prefixes: Prefix Symbol Meaning kilo k 1000 hecto h 100 deka da 10 base - 1 deci d 0. centi c 0. milli m 0. *Remember: K ing H enry D anced B asically D rinking C hocolate M ilk 1 kg = 2.2 lbs Temperature Conversions: F = 1.8C+
C = (F - 32)รท1.
Module 3: Slope intercept form of a line: y=mx + b
- m=slope= ๐๐๐ ๐ ๐๐ข๐
- b=y-intercept=the point (0, b)
Basic tips for inequalities in one-variable: < or > is graphed using an open circle ยฐ โค or โฅ is graphed using a filled circle โข Flip the direction of the inequality sign when multiplying or dividing by a negative Module 4 Measures of Center:
- Mean = the sum of all the data points, divided by the number of data points.
- Median =the middle number when all the data points are written in order from least to greatest
- Mode =the most frequent data point 5 Number Summary: Includes the minimum, maximum, Q1, Q2 (median), and Q Finding Outliers:
- Find the quartiles.
- Any data value less than Q 1 - 1.5(IQR) is an outlier.
- Any data value greater than Q 3 + 1.5(IQR) is an outlier. Measures of Spread:
- Range = max - min
- IQR = Q 3 โ Q 1
Module 5: Determining graphical displays for two variables data set Classification Display Numerical Measures ๐ถ โ ๐ถ (^) Two-way Table Conditional Percentages ๐ถ โ ๐ (^) Side-by-side Boxplot 5 - Number Summary ๐ โ ๐ (^) Scatterplot Correlation Coefficient Module 6 Correlation Coefficient (r): R is always between โ 1 and 1. Positive trend= positive slope= positive r Negative trend = negative slope= negative r
Remove Outlier Effect on R-Value: Module 7: Probability formulas: Rule Operation Formula Key Word Addition Rule Add & Subtract any overlap P(A or B)= P(A)+P(B)-P(A and B) or, either Multiplication Rule Multiply Not Conditional: P(A and B)=P(A)P(B) Conditional: P(A and B)=P(A)P(B|A) and, both Conditional Probability Divide OR if, of, given Complement Rule Subtraction P(not A)=1-P(A) not
