Definitions
Measure of the probability that an observed difference could have occurred by random chance.
What is the p-value?
Testing one population means using a single sample.
What is the one-sample t-test?
Slide 1
What is mean?
This Nintendo game enslaves animals to fight each other and is trapped within small metal devices to make them more accessible.
What is Pokemon?
Two different participants are tested within one experiment.
What is an independent sample t-test?
There is a difference between group 1 and group 2 on self-esteem.
What is rejecting the null hypothesis?
You work as a data analyst for a company that develops mobile apps. The company claims that the average user rating for one of its apps is 4.2 stars. However, you've been hearing that user ratings might actually be higher than the company's claim. You decide to collect a sample of user ratings and test whether the average rating is greater than the claimed 4.2 stars.
What is a one-tailed test?
Slide 2
What is the z-score formula?
These actors all played the same character: Tobey Maguire, Andrew Garfield, Tom Holland.
Who is Spider-man?
A test that calculates the difference of scores between two events.
What is a dependent sample t-test?
The population from which the samples are drawn is _________ distributed, OR the sample size is equal to or greater than 30.
What is a normal sample distribution?
1. The dependent variable is continuous.
2. Data is independent.
3. No significant outliers.
4. Approximately normally distributed.
What are the assumptions (for a one-sample t-test)?
Slide 3
What is the standard deviation?
What movie involves a particular species to help villains conquer the world?
What are the minions?
The Cohen's d is .50.
What is a moderate effect?
The distribution will approach normality as n increases.
What is the Central Limit Theorem?
In a one-tailed test measuring whether the sample mean is greater than the population mean, the t-statistic is -8.16. The critical value is 2.447.
What is we fail to reject the null hypothesis?
Slide 4
What is the pooled variance?
Who played "Asian Jim" in The Office?
Who is Randall Park?
This range, which has a 95% chance of containing the true population parameter, is commonly used to express the precision of an estimate.
What is a CI?
As our sample size increases, the probability that our sample mean is an accurate representation of the true population mean also increases.
What is the law of large numbers?
A researcher wants to test whether the average weight of apples in an orchard differs from the claimed population mean of 150 grams. After taking a sample of 15 apples, the sample mean weight is 154 grams. The Standard Error of the Mean (SEM) for this sample is 2.5 grams. Calculate the t-statistic to determine if the sample mean significantly differs from the population mean of 150 grams.
What is 1.6?
Slide 5
What is the Cohen's d for Independent Samples?
In the Studio Ghibli movie, Princess Mononoke, what type of animal was possessed by a demon in the beginning?
What is a boar?
A researcher compares the test scores of a group of students before and after a study program. The mean difference in scores is 5 points, and the standard error of the mean difference (SEM) is 1.2.
What is 4.17?