STATISTICS MODULE 4 | QUESTIONS AND
ANSWERS RATED A+ | 2025 GUIDE
List the 4 different Graphical Displays for Quantitative Data
- Correct Answer –
Dot Plot - Best to display the distribution of data, particularly clusters,
gaps, and outliers. Most useful for smaller data sets.
Stem Plot (or Stem and Leaf Plot) - Best to display the distribution or
shape of data according to place values. Keeps information about
individual data points.
Box Plot - Best to display the center, spread, and outliers of a given data
set.
Histogram - Best to display the distribution (shape and spread) of
quantitative data. Works well with large data sets.
A stem plot is constructed by separating each data value into a stem and
a leaf. The leaf is the __________ most digit, and the stem consists of
all of the digits to the __________ of the leaf.
- Correct Answer - A stem plot is constructed by separating each data
value into a stem and a leaf. The leaf is the right most digit, and the stem
consists of all of the digits to the left of the leaf.
, Note: Represent each number that is in the ones place from the list of
numbers. By doing this the stems will consist of ones, twos, threes, and
fours. Next list the leafs by taking the digit to the right and writing it within
the coloumn/stem that matches the ones place holder of the number.
Example 31 the ones place/ stem is "3" the Leaf which is to the right of
the number is "1".
After listing all stems and leafs. Re-arrange them in increasing order.
If the list of numbers is long or big you can split the stem and leaf into
two sets. Ex. the first stem set of 1 will list any leafs 1-5 while the second
stem leaf set can list any leafs 6-9. See thirs graph for illustration
What 4 analysis are needed to describe a distribution
- Correct Answer –
1. The shape of the graphical display
2. The center and spread of the data
3. The maximum and minimum values
4. Any values that could be outliers
Identifying the Range, Interquartile Range, and the Standard Deviation
allows us to determine the_____________ of ________________
- Correct Answer - Measure of Spread of a data set
Take the ________________________ of Q1 and Q3 to find the
____________________