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Created: Feb 24, 2019
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Analysis of Sleep Habits
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Group 2 collectively designed a survey to poll respondents re: their sleep habits. A topic very relevant to this group as all members are adult students with many busy schedules.  Survey results can be classified as a convenience sample with voluntary participants as they were obtained through interview and Facebook polling.

The following questions were included in this survey:

1.       Age of participant

2.       Sex (gender)

3.       Average hours of sleep each night

4.       Quality of sleep

Looking at Categorical Variables

Survey Participants by Gender


Result 1: Sleep Survey - Gender Breakdown of Respondants   [Info]
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Of the 258 total respondents of this survey,  the majority were female (79%) and the minority were male (21%).   

Quality of Sleep by Gender

Result 2: Quality of Sleep separated by Gender   [Info]
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Each respondent was asked to rate their average sleep quality.  Both male & female respondents most commonly rate their sleep as "fair" (M: 40.7%, F: 46%) and least commonly rate their sleep as "very poor" (M: 0:01%, F: 3%).  

There are two sleep quality characteristics that had different % based on gender which need to be noted.    There are significant differences between the results for "very good" and "poor".  18.5% of males rate their sleep quality as "very good" however, only 6% of females rated the same.    16% of females rate their sleep quality as "poor" as opposed to the 9% of males.   

Looking at Numerical Variables

Respondents of this survery were also asked to identify their age and the average number of hours of sleep each night.  

In the histogram below, the graph is able to identify the mean amount of sleep as 6.7 hours. 

Histogram of Average Hours of Sleep


Result 3: Histogram Representing Hours of Sleep   [Info]
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Result 4: Boxplot   [Info]
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Summary Statistics


Result 5: Summary Statistics of Average Hours of Sleep   [Info]

Summary statistics:

ColumnnMeanVarianceStd. dev.Std. err.MedianRangeMinMaxQ1Q3

Review of the summary of statistics shows that the average amount of sleep per night is 6.7 hours with a variance of 2.04 and standard deviation of 1.42.   While the minimum amount of hours reported was 2 and the maximum was 11, the median is 7.   There is not a large amount of variability between the data. 

Scatterplot of Age and Hours of Sleep


Result 6: Scatter Plot of Age and Hours of Sleep   [Info]
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