Straighter Line Statistics
Exam/6 questions with Answers
The histogram below displays the distribution of 50 ages at death due to
trauma (accidents and homicides) that were observed in a certain hospital
during a week.
What percentage of deaths were individuals younger than 35? - - 68%
From the histogram we can find that 3 + 18 + 13 = 34 out of the 50
observations fall below age 35 (those within the first three bars), and since
the question asks about the percentage of observations, the answer is
(34/50) * 100 = 68%.
- Here again is the histogram showing the distribution of 50 ages at death
due to trauma (accidents and homicides) that were observed in a certain
hospital during a week.
Which of the following best describes the shape of the histogram? - - Right-
skewed with a possible outlier
The histogram displays a tail to the right (i.e., it is skewed right) with one
isolated observation at around 90 years, which is possibly an outlier.
- Here again is the histogram showing the distribution of 50 ages at death
due to trauma (accidents and homicides) that were observed in a certain
hospital during a week.
For the data described by the above histogram, - - (B) the median will be
smaller than the mean
Remember that we'd expect the mean and the median to be nearly the same
only if the distribution were nearly symmetric. But notice this distribution is
skewed to the right (the tail is towards the right) and we also see a
suspected outlier on the right side. Remember that both of these shape
features will tend to pull the mean more than they would pull the median.
- Here again is the histogram showing the distribution of 50 ages at death
due to trauma (accidents and homicides) that occurred in a certain hospital
during a week.
A possible value of the median in this example is: - - 33
Exam/6 questions with Answers
The histogram below displays the distribution of 50 ages at death due to
trauma (accidents and homicides) that were observed in a certain hospital
during a week.
What percentage of deaths were individuals younger than 35? - - 68%
From the histogram we can find that 3 + 18 + 13 = 34 out of the 50
observations fall below age 35 (those within the first three bars), and since
the question asks about the percentage of observations, the answer is
(34/50) * 100 = 68%.
- Here again is the histogram showing the distribution of 50 ages at death
due to trauma (accidents and homicides) that were observed in a certain
hospital during a week.
Which of the following best describes the shape of the histogram? - - Right-
skewed with a possible outlier
The histogram displays a tail to the right (i.e., it is skewed right) with one
isolated observation at around 90 years, which is possibly an outlier.
- Here again is the histogram showing the distribution of 50 ages at death
due to trauma (accidents and homicides) that were observed in a certain
hospital during a week.
For the data described by the above histogram, - - (B) the median will be
smaller than the mean
Remember that we'd expect the mean and the median to be nearly the same
only if the distribution were nearly symmetric. But notice this distribution is
skewed to the right (the tail is towards the right) and we also see a
suspected outlier on the right side. Remember that both of these shape
features will tend to pull the mean more than they would pull the median.
- Here again is the histogram showing the distribution of 50 ages at death
due to trauma (accidents and homicides) that occurred in a certain hospital
during a week.
A possible value of the median in this example is: - - 33
