EXST 2201 2.2
In the frequency table below, what is the cumulative frequency and the cumulative relative frequency for the category Jun? (2.2 - 7)
160 and 1
the frequency table below, what is the frequency for the category May? (2.2 - 6)
160 x .25 - 40
the frequency table below, what is the relative frequency for the category Mar? (2.2 - 4)
25/160 - 0.156
In the boxplot below, what is the value of the median (2.2 - 17)
27.5
In a boxplot of continuous data, what percent of the data values lie inside the box, and what percent of the data values lie outside the box?(2.2 - 16)
50% and 50%
What type of graph is most appropriate to use to display the shape of qualitative data? (2.2 - 8)
A bar chart where the bars do not touch each other
Why look at a chart to get shape information instead of looking at the data values themselves? (2.2 - 2)
A chart is needed to summarize the shape characteristic so that we can see it
How is a gap distinguished from an extreme value (2.2 - 24)
A gap fits as part of the overall shape. An extreme valie is outside the overall shape
What type of graph is most appropriate to use to display the shape of discrete data? (2.2 - 10)
A histogram where the bars do touch each another
Which of the following answers is NOT one of our overall shapes (2.2 - 20)
A modeless shape
Which of the following answers is NOT an exception when analyzing a histogram? (2.2 - 23)
Any bimodal shapes
a histogram for continuous data, what characteristic is shown on the x-axis, and what characteristic is shown on the y-axis? (2.2 - 12)
Bins of the data values on the x-axis, and the frequency of the data values in the bins on the y-axis.
Match the two meanings below with their appropriate column titles in a frequency table. (2.2 - 3)
Count of the data values in a category - Frequency. Proportion of the data values in a category - Relative frequency.
Which of the following answers is NOT one of the first three columns in a frequency table? (2.2 - 5)
Cumulative Frequency
A boxplot is used to display the shape of qualitative data (2.2 - 14)
FALSE
A skewed left shape means that the peak of the histogram is on the left side of the histogram. A skewed right shape means that the peak of the histogram is on the right side of the histogram. (2.2 - 21)
FALSE
What is the general approach to analyzing the information in a histogram (2.2 - 19)
First look at the overall shape, then look for exceptions
A boxplot shows location and spread information as does a histogram. (2.2 - 15)
TRUE
Pareto chart just a bar chart with the bars rearranged from the highest bar to the lowest. (2.2 - 9)
TRUE
When making a histogram for continuous data, a bin is just a range of possible data values. (2.2 - 13)
TRUE
a histogram for discrete data, what characteristic is shown on the x-axis, and what characteristic is shown on the y-axis? (2.2 - 11)
The data values in the data set, and the frequency of the data values
In any boxplot (an example is shown below), the width of the box shows what characteristic of the data values (2.2 - 18)
The spread of the data values
Skewness in a histogram is a property of what in the histogram (2.2 - 22)
The tails
Why is it important to look at the shape of a column of data before interpreting any statistics? (2.2 - 1)
To see if the data is unimodal, symmetrical, and without any exceptions.
