🧩🎯SR_Prac_IA 2 (Final) Review

Front

What does it mean for a distribution to be skewed right?

Back

A distribution is skewed right when the right tail (higher values) is longer or fatter than the left tail, indicating that there are a few unusually high values.

Front

Define convenience sampling.

Back

Convenience sampling is a non-probability sampling method where samples are taken from a group that is easily accessible, rather than randomly.

Front

What is a boxplot and what does it represent?

Back

A boxplot is a graphical representation of data that shows the distribution's median, quartiles, and potential outliers.

Front

What is the first quartile (Q1) in a boxplot?

Back

The first quartile (Q1) is the median of the lower half of the data set, representing the 25th percentile.

Front

What is the third quartile (Q3) in a boxplot?

Back

The third quartile (Q3) is the median of the upper half of the data set, representing the 75th percentile.

Front

Explain the concept of probability in statistics.

Back

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

Front

What does it mean for a sample to be representative?

Back

A representative sample accurately reflects the characteristics of the population from which it is drawn.

Front

What is the formula for calculating probability?

Back

The probability of an event is calculated as: P(Event) = Number of favorable outcomes / Total number of outcomes.

Front

Define bimodal distribution.

Back

A bimodal distribution has two different modes or peaks, indicating that there are two prevalent values in the data set.

Front

What is the significance of the median in a data set?

Back

The median is the middle value that separates the higher half from the lower half of the data set, providing a measure of central tendency.