Вивчаючи статистику

Percentage distribution—A table of grouped numerical data in which the names of each group are listed in the first column and the percentages of each group of numerical data are listed in the second column.
Pie chart—A chart in which wedge-shaped areas (“pie slices”) represent the count, amount, or percentage of each category and the circle (the “pie”) itself represents the total.
Placebo—A substance that has no medical effect.
Poisson distribution—A distribution to find the probability of the number of occurrences in an area of opportunity.
Population—All the members of a group about which you want to draw a conclusion.
Power of a statistical test—The probability of rejecting the null hypothesis when it is false and should be rejected.
Probability—The numeric value representing the chance, likelihood, or possibility a particular event will occur.
Probability distribution for a discrete random variable—A listing of all possible distinct outcomes and their probabilities of occurring.
Probability sampling—A sampling process that takes into consideration the chance of occurrence of each item being selected.
Published sources—Data available in print or in electronic form, including data found on Internet Web sites.
Range—The difference between the largest and smallest values in a set of data.
Region of rejection—Consists of the values of the test statistic that are unlikely to occur if the null hypothesis is true.
Regression sum of squares (SSR)—Consists of variation that is due to the relationship between X and Y.
Residual—The difference between the observed and predicted values of the dependent variable for a given value of X.
Response variable—The variable to be predicted in a regression analysis.
Sample—The part of the population selected for analysis.