PS 3 FINAL STUDY GUIDE
... o If calculated & T> critical value REJECT the null hypothesis & conclude that there IS a relationship Rejecting the null hypothesis means the slope of regression line (effect of X on Y) is statistically significant R2 helps measure variance in an outcome…CANNOT compare magnitudes of the coefficie ...
... o If calculated & T> critical value REJECT the null hypothesis & conclude that there IS a relationship Rejecting the null hypothesis means the slope of regression line (effect of X on Y) is statistically significant R2 helps measure variance in an outcome…CANNOT compare magnitudes of the coefficie ...
Arithmetic mean for grouped data
... techniques used to summarize a set of data. The techniques are commonly classified as: A. Graphical description in which we use graphs to summarize data. B. Tabular description in which we use tables to summarize data. C. Summary statistics in which we calculate certain values to summarize data. ...
... techniques used to summarize a set of data. The techniques are commonly classified as: A. Graphical description in which we use graphs to summarize data. B. Tabular description in which we use tables to summarize data. C. Summary statistics in which we calculate certain values to summarize data. ...
Distributions of random variables
... ∗ Test yourself: True/False: In a right skewed distribution the Z score of the median is positive. LO 5. Calculate the sampling variability of the mean, the standard deviation of the sample mean, as SDx̄ = √σn , where σ is the population standard deviation. LO 6. Recognize that the Central Limit The ...
... ∗ Test yourself: True/False: In a right skewed distribution the Z score of the median is positive. LO 5. Calculate the sampling variability of the mean, the standard deviation of the sample mean, as SDx̄ = √σn , where σ is the population standard deviation. LO 6. Recognize that the Central Limit The ...
Self-Eval Quiz Answers
... 5. If the mean number of doughnut holes consumed by each customer is 6.5, with a standard deviation of 2.5, and if we assume that the number of doughnut holes eaten follows a normal distribution, we would expect 68% of customers to have eaten how many doughnut holes? a. 4 to 9 b. 2.5 to 11.5 c ...
... 5. If the mean number of doughnut holes consumed by each customer is 6.5, with a standard deviation of 2.5, and if we assume that the number of doughnut holes eaten follows a normal distribution, we would expect 68% of customers to have eaten how many doughnut holes? a. 4 to 9 b. 2.5 to 11.5 c ...
Introduction to Statistics
... Population: is a set of entities concerning which statistical inferences are to be drawn. Sample: a number of independent observations from the same probability distribution Parameter: the distribution of a random variable as belonging to a family of probability distributions, distinguished from eac ...
... Population: is a set of entities concerning which statistical inferences are to be drawn. Sample: a number of independent observations from the same probability distribution Parameter: the distribution of a random variable as belonging to a family of probability distributions, distinguished from eac ...
variation/spread
... data set. Determine the sum of these absolute differences. Divide the sum by the number of data values. " x!x MAD = n ...
... data set. Determine the sum of these absolute differences. Divide the sum by the number of data values. " x!x MAD = n ...