fickernuit's version from 2017-08-14 13:23

Quiz 1

Question Answer
Time Series DataData collected over several time periods
OutlierAn unusually small or unusually large data value
Coefficient of VariationA measure of linear association between two variables between -1 and +1
PopulationIt is the set of all elements of interest for a particular study
VariableCharacteristics of interest for elements
Tree DiagramA graphical representation that helps in visualizing a multiple step experiment
Subjective MethodA method of assigning probabilities on the basis of judgment
Collecting, Analyzing, Presenting, InterpretingStatistics is the art and science of ___, ____, ____, and ____ data
Frequency DistributionA tabular summary of data showing the number in each of several non-overlapping classes
Steam and leaf displayAn exploratory data analysis technique that simultaneously rank order and shape of the distribution of the data
Cross tabulationA set of categorical data with two variables can be organized using what statistical method
ProbabilityA numerical measure of the likelihood an event will occur
Empirical ruleA rule that can be used to compute the percentage of data values that must be within 1 to 3 standard deviations of the mean for data that exhibit a bell shaped distribution
OgiveA graph of a cumulative distribution
Exploratory Data AnalysisMethods that use simple arithmetic and easy to draw graphs to summarize data quickly

Quiz 2

Question Answer
Margin of errorGreatest possible distance between point estimate and the value of the estimated parameter
Interval estimateInterval we can assert with a reasonable degree of certainty that it will contain the parameter
Statistical inferenceThe process of using data obtained from a sample to make estimates or test hypothesis about the characteristics of a population
Central Limit TheoremA theorem that enables one to use the normal probability distribution to approximate the sampling distribution of the mean whenever the sample size is large
UnbiasedA property of a point estimator that is present when the expected value of the point estimator is equal to the population parameter it estimates
Level of significanceThe probability of making a type 1 error when the expected value of the point estimator is equal to the population parameter it estimates
Alternative hypothesisThe hypothesis concluded to be true if the null hypothesis is rejected
P-value approachProbability that provides a measure of the evidence against the null hypothesis from the sample
T-distributionA family of curve that can be used to develop an interval estimate of the population mean whenever the standard deviation is unknown and estimated by the sample standard deviation
ParameterA numerical characteristic of a population like population mean, population standard deviation, a population proportion and so on.

Quiz 3

Question Answer
Correlation coefficientA measure of the strength of the linear relationship between two variables
Coefficient of determinationA measure of the goodness of fit of the estimated regression equation and the proportion of the variability of the dependent variable hat is explained by the estimated regression equation
Least squares methodA procedure used to develop the estimated regression equation
Dependent variableThe variable being predicted or explained
Independent variableThe variable that is doing the predicting or explaining
Simple linear regressionAnalysis involving one independent variable and one dependent variable
FactorIndependent variable of interest
Response VariableDependent variable of interest
TreatmentsDifferent levels of factor
Completely randomized designAn experimental design in which the treatments are randomly assigned to the experimental units
ANOVA TableA table used to summarize the analysis of variance computations and results
Randomized Block DesignAn experimental design employing blocking
Single factor experimentAn experiment involving only one factor with k populations or treatments
PartitioningThe process of allocating the total sum of squares and degrees of freedom to various components
MulticollinearityThe term used to describe the correlation among the independent variables