Q 600- 400- 200- 10 15 Stay (days) # of Female Patients
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The accompanying histogram shows the lengths of hospital stays (in days) for all female patients admitted to a certain hospital during one year with a primary diagnosis of acute myocardial infarction (heart attack). Complete parts (a) through (c) below.
a) From the histogram, determine whether the mean or median is larger. Explain.
Because the distribution is
nearly symmetric,
the mean is expected to be
larger
than the median.Because the distribution is
nearly symmetric,
the mean is expected to be about the same as the median.Because the distribution is
skewed to the high end,
the mean is expected to be
larger
than the median.Because the distribution is
skewed to the high end,
the mean is expected to be
smaller
than the median.Because the distribution is
skewed to the low end,
the mean is expected to be
larger
than the median.Because the distribution is
skewed to the low end,
the mean is expected to be
smaller
than the median.b) Write a few sentences describing this distribution (shape, center, spread, unusual features).
Is the histogram uniform, unimodal, bimodal, or multimodal?
The histogram is multimodal.
The histogram is uniform.
The histogram is unimodal.
The histogram is bimodal.
What is the center of the histogram?
The center of the histogram is day
15.
The center of the histogram is day
8.
The center of the histogram is day 1.
The center of the histogram is day
5.
What is the spread of the distribution as defined by the range ?
The data range from
nothing
to
nothing
days.(Type whole numbers. Use ascending order.)
Describe any unusual features.
There are many outliers.
Some of the data values are significantly different from the other data.
There is a peak at day 1, which may represent patients who did not survive.
There are no unusual features for this distribution.
c) Which summary statistics should be chosen to summarize the center and spread in these data? Why?
The
and
should be chosen because
▼
mean
median
▼
standard deviation
IQR
▼
the distribution is skewed.
the distribution is nearly symmetric.
the data are quantitative.
the data are categorical.
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