Distrubutions

Question 1

how can frequencies relating to continuous data to be plotted?

Answer 1

can be plotted as bars on a histogram or as a continuous curved line on a frequency distribution

Question 2

What is normal distribution?

Answer 2

-appears as a bell shaped curve (symmetrical on either side)

Question 3

what are the features of normal distribution?

Answer 3

•The mean, median and mode are at the midpoint of the graph.
• The graph is symmetrical around the midpoint.
• The dispersion of data either side of the midpoint is consistent.

Question 4

What are most of the scores in normal distribution?

Answer 4

most of the scores are clustered close to the midpoint

Question 5

What are skewed distributions?

Answer 5

If the data are not an even distribution
either side of the mean, the distribution will be skewed.

Question 6

What is a positive skew?

Answer 6

A positive skew has most data falling below the mean, which means the data is concentrated towards the left of the graph, with a long tail to the right. It therefore contains more low scores than high.

Question 7

What skew is it when mode<median<mean?

Answer 7

positive skew

Question 8

what is a negative skew?

Answer 8

has most data falling above the mean, the bulk of the scores are concentrated on the right, resulting in a long tail of anomalous
scores on the left. It therefore contains more high scores than low.

Question 9

What skew is it when mean<median<mode?

Answer 9

Negative skew

Question 10

why is the mode always at the highest point?

Answer 10

As it is the most common value in the mean is in the middle of the graph