Model Evaluation in R

Which type of statistical test is equivalent to the linear model $lm(y \sim 1)$ in R?

One-sample t-test

What does the linear model $lm(y2 - y1 \sim 1)$ in R predict?

The pairwise differences between y2 and y1

Which statistical test is equivalent to the linear model $lm(y \sim 1 + x)$ in R when the method is 'Pearson'?

Pearson correlation test

Which of the following is a measure of overall variability in a dataset?

Variance Signup and view all the answers

What is the formula to calculate the standard deviation of a dataset?

$s = \sqrt{\sum (x - \mu)^2}$ Signup and view all the answers

What does the Central Limit Theorem state?

The sampling distribution of the mean is normal, even if the population distribution is not Signup and view all the answers

What is the standard error of the mean?

The standard deviation of the mean Signup and view all the answers

Which formula is used to calculate a confidence interval?

$d = (X_{\text{bar}} - \mu) / s$ Signup and view all the answers

Which effect size measure is independent of sample size?

Cohen's d Signup and view all the answers

What is the effect size when $r = .3$?

Medium effect Signup and view all the answers

What is the formula for calculating Cohen's d?

$d = (X_{\text{bar}} - \mu) / s$ Signup and view all the answers

Which statistical test is equivalent to the linear model $lm(y \sim 1 + G2)$ in R when the weights argument is specified?

One-way ANOVA Signup and view all the answers

What is the purpose of the function 'signed_rank' in R?

To predict the signed rank of a variable Signup and view all the answers

What is the formula for calculating the mean of a dataset?

$mean = \frac{\sum_{i=1}^{n}x_i},{n}$ Signup and view all the answers

What is the purpose of the function 'glm' in R?

To fit linear models to data Signup and view all the answers

Model Evaluation in R

Questions and Answers