Community 3of3 Final Word Scramble
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Question | Answer |
Statistics | • Science of making statements about an entire population from a limited sample of that population |
Biostatistics | • Biologically relevant |
Convenience sample • | Can’t generalize |
Independent variable | • May determine the outcome |
Nominal | • Lowest level of measurement |
Ordinal | ordered categories. ex ordering high to low |
Interval | equally spaced ex temperature 0 is still a temperature |
Ratio | a set zero. 0 dollars=no money |
Histogram | no spaces between bars |
Bar charts | Bars of equal width/spaces between bars represent each category Height is determined by the relative frequency of occurrence |
Measures of Central tendancy | Attempt to identify the middle |
Mean and median are located to the right or left on a positive skew | Right |
median measures of spread | percentiles and quartiles. lower quartile is the 25th percentile |
Mean measure of spread what is used | standard deviation or variance |
variant deviation is | square root of the variance |
standard deviation may be influenced by | outliers |
What percent fall w/n 2 standard deviations from the mean | 95% |
Scatter diagram measures what | how tightly the points on the scatter diagram cluster around a straight line |
What is used to analyze the effects of 2 or more independent variables simultaneously w/n the same research design and to determine interactions among the variables in multiple sample groups | ANOVA |
Null hypothesis | statement of no relationship between an exposure and outcome |
p-value | probability of a result being further from what would be expected if null hypothesis were true. |
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