NC Math 4 M4 Review #7 Stats

Front

What is the null hypothesis in hypothesis testing?

Back

The null hypothesis (H0) is a statement that there is no effect or no difference, and it serves as the default assumption that any observed effect is due to sampling variability.

Front

What does H0: p = 0.50 represent in hypothesis testing?

Back

It represents the null hypothesis stating that the proportion of a certain characteristic (e.g., babies born male) is equal to 50%.

Front

What type of data can line graphs effectively show?

Back

Line graphs can effectively show trends over time or continuous data.

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1.

Front

How do you calculate the probability of multiple independent events occurring?

Back

Multiply the probabilities of each individual event.

Front

What is an observational study?

Back

An observational study is a type of research where the researcher observes and records behavior without manipulating any variables.

Front

What is an experiment in research?

Back

An experiment is a study in which the researcher manipulates one or more variables to determine their effect on a dependent variable.

Front

What does it mean to reject the null hypothesis?

Back

To reject the null hypothesis means that there is sufficient evidence to conclude that the alternative hypothesis is true.

Front

What does it mean to fail to reject the null hypothesis?

Back

Failing to reject the null hypothesis means that there is not enough evidence to support the alternative hypothesis.

Front

What is a significance level (α) in hypothesis testing?

Back

The significance level (α) is the threshold for determining whether to reject the null hypothesis, commonly set at 0.05 or 0.01.