SIS 1st Semester Exam Review: Red

Front

What is a p-value in hypothesis testing?

Back

A p-value is the probability of obtaining test results at least as extreme as the observed results, assuming that the null hypothesis is true. A low p-value indicates strong evidence against the null hypothesis.

Front

What does it mean to reject the null hypothesis (Ho)?

Back

Rejecting the null hypothesis means that there is sufficient evidence to support the alternative hypothesis, suggesting that the observed effect or difference is statistically significant.

Front

What is the null hypothesis in a statistical test?

Back

The null hypothesis is a statement that there is no effect or no difference, and it serves as the default assumption that any observed differences are due to sampling variability.

Front

How do you calculate the average (mean) of a set of numbers?

Back

To calculate the average, sum all the values in the set and then divide by the number of values.

Front

What is the formula to find the new average after adding a new value?

Back

New Average = (Old Total + New Value) / (Old Count + 1)

Front

What is the probability of an event?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 (impossible) and 1 (certain).

Front

How do you calculate the probability of making at least one success in multiple trials?

Back

P(at least one success) = 1 - P(no successes). For independent events, P(no successes) = (1 - p)^n, where p is the probability of success and n is the number of trials.

Front

What is a streak in sports statistics?

Back

A streak refers to a series of consecutive wins or losses, indicating a pattern in performance over a period.

Front

What is the significance of a 2% p-value in hypothesis testing?

Back

A 2% p-value indicates that there is a 2% chance of observing the data, or something more extreme, if the null hypothesis is true. It is often considered strong evidence to reject the null hypothesis.

Front

What does it mean for a team to perform better on one surface than another?

Back

It means that the team's performance metrics (like win rate) are statistically significantly higher on that surface compared to the other.