Term
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Definition
| The entire group of items/individuals that we want information about, which inference are to be made |
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Term
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Definition
| the smaller group, the part of the population we actually examine in order to gather information. |
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Term
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Definition
| Special case when every unit in the population is measured or surveyed |
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Term
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Definition
| The characteristic of the units that we want to learn about |
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Term
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Definition
| A summery of a variable for the entire population |
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Term
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Definition
| A summary of a variable ample |
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Term
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Definition
| The list of units from which a sample is selected |
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Term
| Voluntary Response Sample |
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Definition
| Only people who volunteer to participate are included in the sample |
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Term
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Definition
| The most convient group is considered as the sample |
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Term
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Definition
| Every different possible sample of the desired size has the same chance of being selected |
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Term
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Definition
| The population is first divided into nonoverlapping groups and a random sample is selected from each group. |
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Term
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Definition
| The population is first divided into nonoverlapping groups, a randome sample is selected of clusters is selected and all individuals in the selected clusters are included in the sample |
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Term
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Definition
| The population is a list divided into consecutive segements. One individual is randomely selected from the first segement and the same position is selected from each of the remaining segements |
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Term
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Definition
| Tendency for a sample to differ from the corresponding population because the sampling frame excludes some parts of the population |
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Term
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Definition
| Tendency for a smaple to differ from the corresponding population bc a subset of the sample cannot be contacted or does not respond |
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Term
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Definition
| Tendency for a sample to differ from the corresponding population bc participants respond differently from how they truly feel |
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Term
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Definition
| variable places a unit into one of several groups or categories |
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Term
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Definition
| Variable takes numeric values for which arithmatic operations such as adding and averaging make sense |
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Term
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Definition
| Approximately symmetric, (right or left) skewed, (uni, bi, or multi) modal |
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Term
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Definition
| Approximate middle of the data set. (Mean or Median) |
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Term
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Definition
| Shows hoe far the data falls from itself. (range and IQR) |
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Term
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Definition
| Add all of the variables and divide by the number of observations |
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Term
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Definition
| Approximately the middle value |
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Term
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Definition
| Equal to the maximun minus the minimum |
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Term
| Interquartile Range (IQR) |
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Definition
| Equal to the third quartile minus the first quartile |
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Term
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Definition
| is the median of the observations less than the overall median ordered list data |
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Term
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Definition
| is the median of the observations greater than the overall median ordered list data |
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Term
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Definition
| Any Process whose outcome is subject to uncertainty |
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Term
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Definition
| The set of all possible outcomes of an experiment |
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Term
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Definition
| Any Collection of outcomes from sample space |
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Term
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Definition
| Consists of exactly one outcome |
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Term
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Definition
| Consists of more than one outcome |
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Term
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Definition
| Set of all outcomes in Sigma that are not in D |
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Term
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Definition
| Of events A and B. Event consisting of all outcomes that are either A or B or both |
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Term
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Definition
| of two events A and B. Event consisting of all outcomes that are in both A and B |
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Term
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Definition
| A and B are said to be mutually exclusive if thier intersection is empty |
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Term
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Definition
| A and B are said to be independent the occurrence of one event does not change the probability of the second event. |
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Term
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Definition
| A precise measure of the chance that a particular event will occure |
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Term
| Standard Score or Z-score |
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Definition
| The distance between an observation and the mean, measured in terms of numer of stadard deviations |
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Term
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Definition
| of a sampling distribution measures the average distance of the possible values of the stats from the mean |
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Term
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Definition
| An estimate of the standard deviation of the sampling distribution |
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Term
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Definition
| Represents a range of reasonable values of a population parameter |
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Term
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Definition
| Represents the proportion of possible samples for which the confidence interval will capture the true parameter |
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Term
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Definition
| Represents the maximum distance between a sample statistic and the population parameter for 95% of the possible values of the statistic |
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