Statistical Flashcard (Technology)

Front

What is the mean in a normal distribution?

Back

The mean (μ) is the average value of a dataset, representing the center of the distribution.

Front

What does standard deviation (σ) indicate in a dataset?

Back

Standard deviation (σ) measures the amount of variation or dispersion in a set of values.

Front

How do you calculate the probability of a normally distributed variable exceeding a certain value?

Back

Use the Z-score formula: Z = (X - μ) / σ, then refer to the standard normal distribution table.

Front

What is an observational study in AI research?

Back

An observational study measures characteristics of interest without changing existing conditions.

Front

What is the difference between dependent and independent events?

Back

Dependent events are influenced by each other, while independent events do not affect each other's outcomes.

Front

What is a two-tailed hypothesis test?

Back

A two-tailed test checks for deviations in both directions from the mean, testing for any significant difference.

Front

What is a right-tailed hypothesis test?

Back

A right-tailed test checks if the sample mean is significantly greater than the population mean.

Front

What is a left-tailed hypothesis test?

Back

A left-tailed test checks if the sample mean is significantly less than the population mean.

Front

What does it mean if an AI algorithm is efficient?

Back

An efficient AI algorithm performs its tasks with minimal resources and time.

Front

What is the significance of a null hypothesis in hypothesis testing?

Back

The null hypothesis states that there is no effect or no difference, serving as a baseline for comparison.