package deal of AP STATISTICS Distinction Guaranteed.

Addition Rule - correct answer P(A ∪ B) = P(A) + P(A) - P(A ∩ B) aids in computing the chances of one of several events occurring at a given time. Alpha (α) - correct answer The probability of a Type I error. See significance level. Alternative Hypothesis - correct answer T...

variable - correct answer holds information about the same characteristic for many subjects categorical variable - correct answer where the data collected places the individuals in various categories or groups quantitative variable - correct answer where the data collected is nu...

Random Sample - correct answer Involves using a chance process to determine which members of a population are included in the sampling. Every member of the population has an equal chance of being selected. Simple Random Sample - correct answer It is a form of random sampling to get n pe...

T-Test - correct answer A test of significance for 1 mean. Requirements: -Normally distributed. If not said make draw a picture to prove. -A simple random sample was performed. Extra: -Degrees of Freedom = n-1 1-Proportion Z-Test - correct answer A test of significance for 1 propor...

response variable - correct answer values of this variable record the results of each trial with respect to what we were interested in trial - correct answer the sequence of several components representing events that we are pretending will take place population - correct answer ...

categorical variable - correct answer places an individual into one of several groups quantitative variable - correct answer takes numerical values for which it makes sense to find an average relative frequency - correct answer the fraction or percent of the time that an event o...

observational study - correct answer we observe the individuals and measure variables of interest but do not attempt to influence the responses experiment - correct answer deliberately impose some treatment on individuals in order to observe their responses voluntary response samplin...

Statistical Significance - correct answer When your discovered p-value is less than your alpha (.05 if not given). States that chance alone would rarely produce an equally extreme result. Non-Response Bias - correct answer A bias caused by a number of people who did not respond to the s...

SOCS - correct answer Shape: Symmetrical, skewed right/left Outliers Center: mean, median Spread: IQR, range, SD DUFS - correct answer Direction: positive, negative Unusual Features: outliers Form: Linear/non-linear Strength: correlation Residuals - correct answer The actu...

data - correct answer systematically recorded information population - correct answer all cases we wish we knew about sample - correct answer all cases we actually examine categorical variable - correct answer all variables that name categories quantitative variable -...

µ - correct answer mean of a population x bar - correct answer mean of a sample σ - correct answer standard deviation of a population S - correct answer standard deviation of a sample x₂ - correct answer second observed x value xi - correct answer all...

Marginal Distribution - correct answer The distribution of values of a variable among all individuals described by the table. (Percent of something out of the total) Conditional Distribution - correct answer The distribution of values of a variable among individuals who have a specific ...

Mean - correct answer Sum of observations/Number of Observations IQR - correct answer Q3-Q1 Resistant to outliers Standard Deviation - correct answer Common measure of spread. How far each observation is from the mean. Found with an average of the squared distances. Then taki...

Random Sample - correct answer Each member of the population is equally likely to be selected. SRS - correct answer A sample of a given size is chosen in such a way that every possible sample of that size is equally likely to be chosen. Systematic Sample - correct answer The fir...