BESC STATS Post Test Chp 4

What is the range for the following dataset: 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5

5

What is the population variance for the following data? 4, 5, 5, 6

0.5

What is the interquartile range (IQR) for the these data: 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 4+

1

What is the sample standard deviation for the following data? 2, 2, 3, 4, 4

1

What does the label "Q2" refer to?

The median score or the 50th percentile

What does the symbol \sigma^2 σ 2 stand for?

The population variance

What is the relationship between the standard deviation and the variance?

The standard deviation is the square root of the variance

What is the degrees of freedom for the sample variance?

n - 1

Compared to a mesokurtic distribution, the peak of a leptokurtic distribution is...

narrower and higher.

What are the values of skewness and kurtosis for a normal distribution?

skewness = 0 and kurtosis = 0