Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Probability |
Function of favorable outcomes (must be between 0-1) |
|
|
|
Positive correlation |
One increases, other increases |
|
|
|
Negative correlation |
One increases, other decreases |
|
|
|
Central limit theorem |
Percentages obtained by taking many samples of the same size from a population are approx normally distributed (n>_ 30) |
Allows you to use the normal distribution |
|
|
Confidence interval |
Result adjusted by adding and subtracting the margin of error |
|
|
|
Confidence level |
Percentage of such polls in which the confidence interval contains the true result |
|
|
|
Independent events |
Outcome of one event does not change the probability of the other |
|
|
|
Dependent events |
Outcome of one event affects the other event (not replacing a card in a deck) |
|
|
|
Boxplot |
Graphic representation of the 5 no summary (median, quartiles, and extremes) |
Median |
|
|
Histogram |
Bar graph that shows the frequencies with which certain data occur (bars are touching, draw curve that shows probability under it) |
Mean |
|
|
Outlier |
Data point that doesn't fit into the pattern, significantly different from the rest of the data |
|
|
|
P-value |
Measures the probability that the outcome of an event would occur by chance alone.
Small p-value- evidence that the event in question is unlikely to be due to chance alone. Statistically significant if p-value is less than .05 |
|
|
|
Normal distribution |
1. Graph is bell shaped curve 2. Mean and median close to the same 3. Most of the data tend to be clustered relatively near the mean 4. The data are symmetrically distributed above and below the mean |
|
|
|
How to find standard deviation |
1. Find mean 2. Subtract mean from all data points 3. Square all answers 4. Add them 5. Divide by number of answers
Calculator: 1. Create list of data points in calculator 2. Stat- calc- enter-calculate 3. Little sigma x |
|
|
|
How to find margin of error for a 95% confidence level? |
1. Use formula on formula page
|
|
|
|
How to find sample size? |
Use formula
M=margin of error (2% is just written as 2) |
|
|
|
combinations |
Multiply all the outcomes |
|
|
|
Empirical rule |
68-95-99.7% Only works in normal distribution |
|
