Term
| What is the difference between Numerical and Categorical Variables? |
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Definition
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Term
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Definition
| Used for categorical varibles |
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Term
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Definition
| Watching, not controlling variables |
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Term
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Definition
| Researchers choose groups randomly |
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Term
| What are the 3 ways to display Numerical Distribution? |
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Definition
1. Histogram
2. Dot plot
3. Stem plot
4. Box plot |
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Term
| What are the 3 features discusses for Numerical Distribution? |
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Definition
1. Shape (symmetrical, bimodal, unimodal)
2. Spread (IQR or Range)
3. Center (Median) |
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Term
| What are the 2 ways to display Categorical Distribution? |
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Definition
1. Bar Chart
2. Pie Graph |
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Term
| What are the 2 features of a Categorical Distribution? |
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Definition
1. Variability (diversity)
2. Mode (thing that occurs the most) |
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Term
| 3 shapes in Mean vs Meadian in skewed distribustion |
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Definition
1.Mean=Meadian→symmetric
2. Mean>Median→right-skewed
3.Mean<Median→left-skewed
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Term
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Definition
Interquartile Range, how spread out the middle 50% of data is (measure of spread)
-Q3-Q1 |
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Term
| What measures are resistant to outliers? |
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Definition
1. Median (center)
2. IQR (spread) |
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Term
| What are the 4 features used to describe a scatterplot? |
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Definition
1.Trend (positive or negative)
2.Strength (weak or strong)
3.Shape (liner or not)
4. Outliers |
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Term
| How do we find potential outliers? |
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Definition
| Any point 1.5XIQR away from Q1 or Q3(edges of the box) |
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Term
| What is the Five Number Summary? |
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Definition
1.Min
2.Q1
3.Median
4.Q3
5.Max |
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Term
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Definition
| Type of letter groupings (x) |
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Term
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Definition
| # of letter memorized (Y) |
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Term
| What is the Emperical Rule? |
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Definition
| The rules gives the approximate % of observations w/in 1 standard deviation (68%), 2 standard deviations (95%) and 3 standard deviations (99.7%) of the mean when the histogram is well approx. by a normal curve |
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Term
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Definition
y=a+bx
a=(y-intercept)
bx(slope) |
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Term
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Definition
1. -1≤r≤1
2. r positive (+ trend)
r negative (- trend)
3. strength
close to 1 or -1 (strong)
close to 0 (weak) |
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Term
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Definition
| a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed |
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Term
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Definition
| another term for proportion; number of times event occurs divided by the number of trials (long run) |
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Term
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Definition
| making predictions beyond intended bounds |
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Term
| Coefficient of Determination |
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Definition
r²
-Reported as a percent
-measures the variation in the response variable |
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Term
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Definition
| How many times the value occured in the collection of data (count) |
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Term
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Definition
| When someone who doesn't see the participants or doesn't participate in determining the results handles the assignment group |
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Term
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Definition
| Assignment is left to chance (Flipping a coin) |
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Term
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Definition
| It's the individual entities whose characteristics are measured (In a study of flaws in a manufacturing system, an "observational unit" might be a toy that the system produces) |
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Term
| Is a mean resistant to outliers? |
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Definition
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Term
| Is a Median resistant to outliers? |
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Definition
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Term
| Is the standard deviation resistant to outliers? |
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Definition
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Term
| Is the (Lower Quartile-Upper Quartile) ÷ 2 resistant to outliers? |
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Definition
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Term
| Is the (Maximum-Minimum) ÷ 2 resistant to outliers? |
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Definition
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