ACC ISRD ACF

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 survey. p-Value - correct answer The probability of getting a result at least as extreme as the result given from the test. The lower the value the stronger the evidence. Empirical rule - correct answer St...

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 the entire group of individuals or instances about whom we hope to learn sample - correct answer a representative subset of a population, examined in hope of learning about the population

Population - correct answer Entire group of individuals we want info about Census - correct answer Collects data from every individual in the popluation Sample - correct answer Subset of individuals in the population from which we actually collect data Convenience (Sample) - correct answer Choosing individuals from the population who are easy to reach. Ex. A manufacturer has representatives at the mall asking shoppers their opinions of various products. Bias (sample) - correct answe...

SRS - correct answer -unbiased, each unit has the same chance of being chosen -independent-selection of one unit has no influence on the selection of other units -all possible samples of n objects are equally likely Stratified random sample - correct answer -you know something about the population ahead of time -divide the population into homogeneous groups (Strata) -take an SRS from each Strata Cluster Sampling - correct answer -Population is grouped together in clusters -Take an SRS...

Statistical Significance - correct answer An observed effect too large to attribute plausibly to chance. Non-Response Bias - correct answer Bias introduced to a sample when a large fraction of those sampled fails to respond. P-Value - correct answer found by substituting the x-value in the regression equation; they're the values on the fitted line Empirical Rule - correct answer A statistical rule stating that for a normal distribution, almost all data will fall within three standard d...

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 numerical and it makes sense to use it for numerical operations frequency table - correct answer lists the categories for a categorical variable and displays the counts for each category relative frequency table...

Inference for Regression (CONDITIONS) - correct answer Linear: True relationship between the variables is linear. Independent: observations, 10% condition if sampling without replacement. Normal: Responses vary normally around the regression line for all x-values Equal Variance: around the regression line for all x-values Random: Data from a random sample or randomized experiment Paired t-test: Phrasing Hints, H0 and Ha, Conclusion - correct answer Key Phrase: MEAN DIFFERENCE H0: μDif...

observational study - correct answer observe individuals and collect data without any interference with conditions what are the two different types of observational studies - correct answer retrospective and prospective Retrospective observational study - correct answer an observational study that has already occured prospective observational study - correct answer an observational study being studied as it ocurs experiment - correct answer deliberately impose some treatment on indiv...

5 number summary - correct answer The minimum value, lower quartile, median, upper quartile, and maximum value for a data set. These five values give a summary of the shape of the distribution and are used to make box plots. The five numbers that help describe the center, spread and shape of data z score - correct answer a measure of how many standard deviations you are away from the norm (average or mean) -Number of standard deviations a score is above or below the mean (positive...

describing and comparing distribution - correct answer SOCS - shape, outliers, center, spread, with context, (compare if necessary 2 distributions) Comparing and describing scatterplots - correct answer DUFS - Direction, unusual features, form, and strength z-score - correct answer The value is the (z - score) of standard deviations above/ below the mean of (mean). correlation (r) - correct answer r gives the strength and direction of a linear association between two quantitative variab...