Stats review_3.11.25

α = .05. p = .015. What should you do?

Erin gave two random groups of mice either a drug or a placebo and measured changes in behavior.

t-observed = 2.53, t-critical = 2.21. What should you do?

Jane tested the correlation between age and speeding tickets.

Of the choices below, which can be used to make causal inferences?

What kind of skew is this?

What is the approximate probability of obtaining value with a z-score below -2?

By convention, p-values need to be _________ to be considered statistically significant.

a One-Way ANOVA has:

a two-Way ANOVA has:

Income distributions are typically _______ because a few people have a huge amount of money.

As sample size increases, the t-distribution becomes:

Which distribution has a larger standard deviation (assuming the x-axes are on the same scale)?

a Two-Way ANOVA has:

When data are converted into z-scores the standard deviation becomes:

Distributions with a lot of spread will be ________. Whereas distributions with little spread will be ________.

When data are converted into z-scores the mean becomes:

Hannah investigated whether or not choice in college major was related to SAT scores.

Used to make predictions about populations based on sample statistics.

Mean = 154 and Median = 122. What direction is the skew?

a One-Way ANOVA has:

Random assignment and variable manipulation are components of:

p-values reflect the probability of making a: