Lurking variable Study guides, Class notes & Summaries

Statistics Module 6 (A+ Graded 100% Verified) P-value Ans: The probability that a result was caused by chance. observational study Ans: The researcher observes if there is an association between variables. There is no treatment or control group. population Ans: An entire pool from which a sample is drawn. causation Ans: A relationship of cause and effect between two or more variables. simple linear regression Ans: The prediction of one response variable's value from one or ...

WGU C955 Formulas and Terms (Latest 2023/ 2024 Update) Applied Probability and Statistics | Questions and Verified Answers| 100% Correct Q: Simpsons Paradox A counterintuitive situation that occurs when a result that appears in individual groups of data disappears or reverses when the groups are combined. Can only occur when the sizes of the groups are inconsistent Q: Lurking Variables : Answer: • A lurking variable is a variable not included in the study, but affects the varia...

WGU C784 Statistics FULL COURSE REVIEW Graded A+ Lurking Variable - Associated with the explanatory and the response variables that is not directly being studied.

WGU C784 Statistics FULL COURSE REVIEW Graded A+ Lurking Variable - Associated with the explanatory and the response variables that is not directly being studied.

Straighterline Introduction to Statistics Questions and Answers Already Passed Four steps in the process of statistics 1. Producing Data 2. Exploratory Data Analysis 3. Probability 4. Inference Categorical variable places individuals into one of several groups Two types: nominal and ordinal Quantitative Variable represents a measurement or a count Two types: Interval and ratio Nominal Variable categorical variables where there is no natural order among the categories Ordinal...

lurking variable : A variable that is not included in an analysis but that is related to two (or more) other associated variables which were analyzed. simple linear regression : the prediction of one response variable's value from one explanatory variable's value Simpson's Paradox : A counterintuitive situation in which a trend in different groups of data disappears or reverses when the groups are combined. degree : The largest exponent in a mathematical expression or equation. ...

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 Variables correct answer: variable of interest (y) Explanatory Variables correct answer: variable that explains y (x) Correlation Coefficent correct answer: measure strength of linear association Slope correct answer: b1= r(sy/sx) Y-Intercept correct answer: b0= ybar - (b1)(xbar) Point always on regression line correct answer: (xbar,ybar) R2 measures correct answer: fraction of variability of y accounted for by least squares linear regression on x Regression ...

Statistical Significance 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 A bias caused by a number of people who did not respond to the survey. p-Value 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 States that, in a normal distribution, about 68% of the te...

a _______ describes an individual by placing the individual into a category or group, such as male or female correct answer: qualitative variable a _____ is a quantitative variable that has either a finite number of possible values or a countable number of possible values correct answer: discrete variable a _____ is a quantitative variable that has an infinite number of possible values that are not countable correct answer: continuous variable a _____ is an explanatory variable that ...