Question

1)The range is

a) the difference between the inner fences.

b) the H-spread.

c) not influenced very much by outliers.

d) the difference between the highest and lowest score.

e) an obscure, large appliance in the kitchen useful only for storage

2)If the whiskers on a boxplot are much longer on the right than on the left, we would suspect that the distribution is

a) positively skewed.

b) negatively skewed.

c) symmetric.

d) distorted.

3)Data points that lie outside the whiskers in a boxplot are often referred to as

a) incorrect values.

b) outliers.

c) representative values.

d) deviates.

4)

The vertical line in the center of a box plot

a) represents the sample mean.

b) represents the sample median.

c) serves to anchor the box.

d) can represent anything you want it to

5)

The difference between s and σ is that s is

a) the value of the standard deviation in a sample.

b) the long range average of the variance over repeated sampling.

c) the biased estimate of s.

d) the value of the standard deviation in a population.

6)

A frequency distribution

a) displays the average of each score received.

b) offers no more information than a collection of raw data.

c) counts the number of times each score within a range is received.

d) does none of the above.

Answer 1

1) The range is

a) the difference between the inner fences.

b) the H-spread.

c) not influenced very much by outliers.

d) the difference between the highest and lowest score.

e) an obscure, large appliance in the kitchen useful only for storage

The correct option is d)

Range = Maximum value - Minimum value

2) If the whiskers on a box plot are much longer on the right than on the left, we would suspect that the distribution is

a) positively skewed.

b) negatively skewed.

c) symmetric.

d) distorted.

The correct option is a)

When right whisker is longer than the left then the distribution is right skewed or positively skewed.

3) Data points that lie outside the whiskers in a box plot are often referred to as

a) incorrect values.

b) outliers.

c) representative values.

d) deviates.

The correct option is b)

Outliers are the points outside the range of box plot

4) The vertical line in the center of a box plot

a) represents the sample mean.

b) represents the sample median.

c) serves to anchor the box.

d) can represent anything you want it to

The correct option is b)

Median represents the middle value of the box plot.

5) The difference between s and σ is that s is

a) the value of the standard deviation in a sample.

b) the long range average of the variance over repeated sampling.

c) the biased estimate of s.

d) the value of the standard deviation in a population.

The correct option is a)

s denotes the standard deviation in the sample where as σ is the standard deviation in the population

6) A frequency distribution

a) displays the average of each score received.

b) offers no more information than a collection of raw data.

c) counts the number of times each score within a range is received.

d) does none of the above.

The correct option is c)

In frequency distribution we count the observation within a range.