Statistics Study guides, Class notes & Summaries

Positive correlation As one variable increases, the other variable increases Negative correlation As one variable increases, the other decreases A point on the scatter plot represents how many values? 2 (X and Y) Relationship between linear and scatter plot diagrams? The regression line is the bestfitting line through a scatter plot If you see the notation (E X)(E Y) what should you do? First sum the Xs, then sum the Ys, then multiply the sums If you see the notation E XY what should you...

A study was conducted to see if gender influences the number of alcoholic beverages consumed per day. Which type of classification is this? : Categorical, categorical (Categorical, quantitative) Quantitative, categorical Quantitative, quantitative Given the following set of numbers: 25, 2.5, -2, and -1 what is the product of the integers? 250 50 100 2 | P a g e -2 : Given the following set of numbers: 25, 2.5, -2, 2, and -1 What is the product of the integers? : -2 50 ...

A study was conducted to see if gender influences the number of alcoholic beverages consumed per day. Which type of classification is this? : Categorical, categorical (Categorical, quantitative) Quantitative, categorical Quantitative, quantitative Given the following set of numbers: 25, 2.5, -2, and -1 what is the product of the integers? 250 50 100 2 | P a g e -2 : Given the following set of numbers: 25, 2.5, -2, 2, and -1 What is the product of the integers? : -2 50 ...

Categorical variables that there is no natural order among the categories : nominal variables Categorical variables where there is natural order among the categories (low-high) : ordinal variable A measurement which makes sense to talk about the difference between values but not the ratio between values : interval Quantitive variables where is makes sense to talk about the difference in ratios. (Income, weight) : ratio Value 0 means the absence of quantity (income $0) : In ratios: ...

nominal variables : Categorical variables that there is no natural order among the categories ordinal variable : Categorical variables where there is natural order among the categories (lowhigh) interval : A measurement which makes sense to talk about the difference between values but not the ratio between values ratio : Quantitive variables where is makes sense to talk about the difference in ratios. (Income, weight) In ratios: 2 | P a g e : Value 0 means the absence of quantity...

Based on the results shown, what do you think the relationship is between age and depression? a) It is positively correlated b) It is negatively correlated c) No correlation d) Can't tell from this display : The correct answer is d. We can not determine the relationship between age and depression as we don't know how the data pair up. The other question answer choices cannot be determined because to assess correlation we need to be able to see how the data is paired. A car compan...

Ch 1 Intro to Statistics Questions and answers latest update

Chapter 1 Introduction to Statistics Questions and answers latest update

Introduction to Statistics Questions and answers latest update

Statistics Definitions Chapter 1 Questions and answers latest update