2115 Univariate Data - Stem & Leaf Plots

21 Questions | By Anunan | Last updated: Mar 21, 2022 | Total Attempts: 624

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2115 Univariate Data - Stem & Leaf Plots - Quiz

Stem & Leaf, Split Stem & Leaf Plots and Back-to-Back Stem & Leaf plots

Questions and Answers

1.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
2.

Back-to-back stem & leaf plots allow you to :
- A.
  
  Map your data on the left, and sort it on the right
- B.
  
  See how skewed your data set is
- C.
  
  Compare the distribution of two data sets
- D.
  
  Split your data set into two similar sizes
- E.
  
  Compare the upper values with the lower values
- F.
  
  I don't know
3.

Back-to-back stem & leaf plots have :
- A.
  
  Larger values
- B.
  
  A common stem
- C.
  
  Smaller values
- D.
  
  A normal distribution
- E.
  
  A neutral distribution
- F.
  
  I don't know
4.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
5.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
6.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
7.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
8.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
9.

The image above is :
- A.
  
  A stem & leaf plot
- B.
  
  A split stem & leaf plot
- C.
  
  A back-to-back stem & leaf plot
- D.
  
  A back-to-back split stem & leaf plot
- E.
  
  I don't know
10.

The image above is stem and leaf plot. How many 'splits' does it have?
- A.
  
  None, its just an ordinary stem and leaf plot
- B.
  
  Two splits
- C.
  
  Three splits
- D.
  
  Five splits
- E.
  
  I don't know
11.

When do we split a stem & leaf plot?
- A.
  
  When there are too many leaves to see a shape
- B.
  
  When the shape is negatively skewed
- C.
  
  When we suspect there are outliers
- D.
  
  When the shape is positively skewed
- E.
  
  When here are too few numbers on a branch
- F.
  
  I don't know
12.

How many values do you need in a data set for a stem and leaf plot to be useful?
- A.
  
  Less than 12
- B.
  
  More than 80
- C.
  
  More than 200
- D.
  
  Between 10 & 15
- E.
  
  More than 5 but less than 50
- F.
  
  I don't know
13.

Back-to-back stem & leaf plots allow you to :
- A.
  
  Map your data on the left, and sort it on the right
- B.
  
  See how skewed your data set is
- C.
  
  Compare two data sets
- D.
  
  Split your data set into two similar sizes
- E.
  
  Compare the upper values with the lower values
- F.
  
  I don't know
14.

Using a split stem & leaf plot can help :
- A.
  
  Compress the data
- B.
  
  Simplify the data
- C.
  
  Reveal features that were not easily detected
- D.
  
  Hide features that are easily detected
- E.
  
  Reduce the number of errors
- F.
  
  I don't know
15.

In a stem & leaf plot, outliers can be hidden if :
- A.
  
  There are too many intervals in a stem
- B.
  
  We multiply the interquartile range by 1.5
- C.
  
  They are left out of the range
- D.
  
  There are too few intervals on the stem
- E.
  
  The interquartile range is large
- F.
  
  I don't know
16.

In a stem & leaf plot, we can detect the general shape of the distribution by :
- A.
  
  Counting the total number of leaves and dividing by the stem
- B.
  
  Counting the number of stems and dividing the leaves
- C.
  
  Turning the stem counter-clockwise so it is horizontal
- D.
  
  Mirroring the stem in a clockwise direction
- E.
  
  Finding the range and the IQR
17.

I collect data for 40 adults relating to the number of hours they watch television per week. I create a stem & leaf plot and the data which ends up with three intervals on the stem.What should I do?
- A.
  
  Create a histogram instead
- B.
  
  Use a dot plot instead
- C.
  
  Split the stem into intervals of two
- D.
  
  Split the stem into intervals of 10
- E.
  
  Create a back-to-back stem & leaf plot
- F.
  
  Three intervals is enough for 40 pieces of data, leave it how it is.
18.

A stem & leaf plot is ideal for :
- A.
  
  Ordering data
- B.
  
  Finding the median
- C.
  
  Finding the modal class
- D.
  
  Finding the max & min
- E.
  
  Finding the mean
- F.
  
  Finding the standard deviation
- G.
  
  Counting z-scores
19.

A stem & leaf plot is ideal for :
- A.
  
  Ordering data
- B.
  
  Separating categorical data
- C.
  
  Finding the mean
- D.
  
  Finding the standard deviation
- E.
  
  Counting z-scores
20.

I have collected the scores for the latest Geography test, and created the stem & leaf plot above.If the value '0' is an outlier, and I'm not saying if it is or it isn't, what is my range?
21.

I collected the results for the latest Geography test and sorted them into the stem & leaf plot above.Is the minimum value an outlier?
- A.
  
  Zero is never considered an outlier
- B.
  
  No, there must be two gaps to make it an outlier.
- C.
  
  Probably, but I'd need to check
- D.
  
  Yes, because zero is always considered to be an outlier
- E.
  
  No because outliers are always on a positive skew