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Histograms, Skewness and Symmetry

Related Topics

Wize University Statistics Textbook > Exploratory Data Analysis

Skewness and Symmetry

2 Activities

Wize University Statistics Textbook > Displaying & Summarizing Quantitative Data

Histograms

4 Activities

The histogram refers to the number of emails Melanie responds to during a day at work:

Which of the following is true?
More Skewness and Symmetry Questions:
Skewness and Symmetry
For each variable, determine whether its distribution is more likely to be symmetric, skewed to the right, or skewed to the left.
NHL players' salaries.
Skewness and Symmetry
For each variable, determine whether its distribution is more likely to be symmetric, skewed to the right, or skewed to the left.
Number of pets in a household.
Skewness and Symmetry
Here's a summary of the statistics for the height of students in a kindergarden class:
Shortest student: 83cm
Mean height: 92cm
Skewness and Symmetry
If the graph of a distribution is positively skewed, what must be true about this graph?
Skewness and Symmetry
Twenty-three students wrote a quiz and their marks out of 50 are recorded. Here is the data: 8, 20, 21, 22, 30, 30, 31, 36, 37, 37, 37, 41, 41, 42, 43, 44, 45, 45, 45, 48, 48, 49, 50.
Which of the following is true?
Boxplots: Skewness and Symmetry
The 5 number summary statistics for the number of years a typical family owns their first home before selling it is given by:
0.5  1  3.5  6  300.5\ \ 1\ \ 3.5\ \ 6\ \ 30
A total of 120 families participated in this study.
Skewness and Symmetry
The distribution of a nominal variable can be...
Skewness and Symmetry
True or false? Enter "T" for true and "F" for false.
1. Multimodal distributions could not be skewed.
F
2. If the mean is equal to the median, then the distribution must be symmetric and unimodal.
F
Histograms, Skewness and Symmetry
Melanie was able to respond to 91 emails today. If we add this additional data to the histogram, what will happen?
Skewness and Symmetry
The data "peaks" at a bin near the higher end of a unimodal histogram. Which of the following is true about the distribution?
More Histograms Questions:
Histograms
The quiz scores for 3 different stats classes are displayed in the following histograms. Which class has the smallest standard deviation and the largest mean, respectively?
Histograms
The following 3 histograms summarize the heights of children in 3 different day care groups, each with 50 children.
Fill in the following statments with A, B or C
Mode of
C
> Mode of
A
>Mode of
B
Histograms
The following histogram shows the distribution of the number of STAT 151 classes attended by 20 students in the Winter 2019 semester. In each class interval, the left enpoint is included but not the right.
What percent of these students attended 20 or more classes but fewer than 30 classes?
Histograms
The quiz scores for 3 different stats classes are displayed in the following histograms. Which class has the smallest standard deviation and the largest mean, respectively?
Histograms
Practice: Comparing Histograms
The following 3 histograms summarize the heights of children in 3 different day care groups, each with 50 children.
Fill in the following statments with A, B or C
Histograms
Which of the following could be the median of the histogram above?
Histograms
Melanie keeps track how many emails she can respond to during a shift. The frequency refers to the number of emails:
Melanie was able to respond to 91 emails today. What will happen?
Histograms
Melanie keeps track how many emails she can respond to during a shift. The frequency refers to the number of emails:
Which of ones are TRUE and which are FALSE:
a) The distribution is roughly symmetric.
Histograms
Which of the following could be the IQR of the histogram above?
Histogram
Problem
Which of the following could be the median of the histogram above?
Histograms
Melanie was able to respond to 91 emails today. If we add this additional data to the histogram, what will happen?
Histograms
The histogram refers to the number of emails Melanie responds to during a day at work:
Which of the following is true?
Histograms and Time Series
Vinnie sells cashmere scarves all year round. His sales are shown in a time series:
Which histogram matches the time series plot above?
Histograms
We randomly sample 168 people and ask them how many glasses of wine they drink per week.
Here is the histogram:
What can you say about the shape of this histogram?
Histograms
There are four sections in STAT 123, each with 80 students. The distributions of grades for each section are shown below in histograms.
Which of the following is true? (Check all that applies.)
Histograms, Skewness and Symmetry
Melanie was able to respond to 91 emails today. If we add this additional data to the histogram, what will happen?