# Describing Data Flashcards Preview

## PS3021 Stats > Describing Data > Flashcards

Flashcards in Describing Data Deck (11)
1
Q

Which measure of central tendency is least bistable for normally distributed data?

A

The mean.

2
Q

Which measure of central tendency is least bistable for non-normally distributed data?

A

The median.

3
Q

What does a probability distribution allow that a frequency one does not?

A

Comparisons irrespective of sample size.

4
Q

Give 2 advantages of frequency plots.

A

They display all data points making no assumptions and they show potential outliers/odd ball values in context.

5
Q

Give 2 disadvantages of frequency plots.

A

Not very good as summaries and often have so many distributions that comparisons are difficult.

6
Q

Give 3 advantages of box plots.

A

They make very few assumptions, highlight potential outliers/odd ball values and facilitate comparisons between conditions.

7
Q

Give 2 disadvantages of box plots.

A

Plotting outliers can lead to a cluttered figure and a focus on them rather than the overall pattern of results.

8
Q

Give a formal definition of statistics.

A

A function of a sample where the function itself does not depend on the sample.”

9
Q

Briefly describe the Bayesian approach.

A

Uses subjective probability and asks about the likelihood of a view given the data.

10
Q

Briefly describe the frequentist approach.

A

Uses objective probability and asks about the likelihood of the data given a view of how the world works.

11
Q

How do we decide to reject a hypothesis, when any result is possible, but some are very unlikely?

A

Make an a priori decision as to what results are too unlikely.