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Statistics Test 2
test 2 stats class
| Question | Answer |
|---|---|
| Measure of Center | Value at the senter or middle of a data set. |
| Arithmetic mean/ Mean | A set of data is the measure of center found by adding the data values and dividing the total by the number of data values |
| Sample size | Number of data values |
| Median | The measure of center that is the middle value when the originaldata values are arranged in order of increasing (or decreasing) magnitude |
| Mode | the value that occurs with the greatest frequency |
| Bimodal | When 2 data values occur with the same greatest frequency, each one is a mode |
| Multimodal | When more than 2 data values occur with the same greatest frequency, each is a mode |
| No Mode | When no data value is repeated |
| Midrange | The measure of center that is the value mid-way between the maximum and minimum values in the original data set |
| Skewed | If it is not symmetric and extends more to one side than the other |
| Range | The differencde between the maximum data values and the minimum data values. Range=Max-min data values |
| Standard Deviation | Measure of variation of values about the mean |
| Variance | Measure of variatioan equal to the square of the standard deviation |
| Range Rule of Thumb | Based on the principle that for any data sets, the vast majority of sample data values lie within 2 standard deviations of the mean |
| Empirical Rule | Data sets that are approxiamently bell shaped these properties apply. 68% fall with in 1 standard deviation. 95% fall within 2 standard deviations. 99.7% fall within 3 standard deviations |
| Coefficient of Variation(or CV) | A set of nonnegative sample or population data, expressed as a percent, describes the standard deviation relative to the mean |
| Z Score | Number of standard deviations that a given value x is above or below the mean. Round to 2 decimal places (9.08) |
| Percentiles | Measures of location, which divide a set of data into 100 groups with about 1% of the values in each group |
| Quatiles | Measures of location, which divide a set of data into 4 groups with about 25% of the values in each group |
| Coefficient of Variation(or CV) | A set of nonnegative sample or population data, expressed as a percent, describes the standard deviation relative to the mean |
| Z Score | Number of standard deviations that a given value x is above or below the mean. Round to 2 decimal places (9.08) |
| Coefficient of Variation(or CV) | A set of nonnegative sample or population data, expressed as a percent, describes the standard deviation relative to the mean |
| Z Score | Number of standard deviations that a given value x is above or below the mean. Round to 2 decimal places (9.08) |
| Percentiles | Measures of location, which divide a set of data into 100 groups with about 1% of the values in each group |
| Boxplot | Graph of a data set that consist of a line extending from the min to max value, and a box with lines drawn at Q1, the median, and Q3 |
| Quatiles | Measures of location, which divide a set of data into 4 groups with about 25% of the values in each group |
| 5-number Summary | Consist of the minimum value, the first quartile, the median(Q2), Q3, and the maximum value |
| Boxplot | Graph of a data set that consist of a line extending from the min to max value, and a box with lines drawn at Q1, the median, and Q3 |
| Event | Any collection of results or outcomes of a procedure |
| Simple Event | Outcome or an event that cannot be further broken down into simpler components |
| Sample Space | Consist of all possible simple events |
| Complement | Event A, consist of all outcomes in which event A does not occur |
| Actual Odds Against | A and B are integers having no common factors. A:B |
| Actual odds in favor | B:A |
| Payoff Odds | The ratio of the net profit to the amount bet |
| Compound Event | Any event combining 2 or more simple events |
| Disjoint | If they cannot occur at the same time |
| Independant | Occurance of one event does not affect the other event |
| Dependant | One event affects the other |
| Random Variable | Variable that has a single numerical value, determined by chance, for each outcome of a Drocedure |
| Probability Distribution | Description that gives the probability for each value of the random variable |
| Discrete Random Variable | Finite number of values or a countable number of values |
| Continuous Random Variable | Infinitely many values, and those values can be associated with measurements on a continuous scale witout gaps or interruptions |
| Expected Value | Represents the mean of the outcomes |
Created by:
barrelracer0218
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