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Is there any correlation between Age and Average Number of Hours of Sleep each Night?

Is there any correlation between Age and Average Number of Hours of Sleep each Night?

As an IB student, I get a lot of homework, which takes a while and obviously has an effect on the hours of sleep that I am able to get. I wondered whether this was simply a problem that students doing the IB had or whether age has no factor in the hours of sleep that someone gets. So basically, in this project, I will aim to see whether there is any correlation between the average hours of sleep each night and year group/age. I will also analyse the different genders to determine if there is a difference between male and female.

To get a well rounded variation of results for different ages, I will ask six randomly selected people from each year group (Yr 7 – Yr 13) how many hours of sleep they get on average each night. This will give me 35 different results, which is a fairly large amount, to be able to get a correlation from, if there is one.

After getting this data, I will analyse and compare it to see if there is any correlation. This will give me some idea, visually, whether there may or may not be a correlation. Also, the use of Pearson’s correlation coefficient will give me a measure of the correlation between the two variables. I will then create a bar graph which will once again give me another visual indication of whether there is any correlation which will then lead me on to a Chi-Squared Test of independence to see whether age and hours of sleep are dependant or independent.

Table 1. Year 7 Student’s Sleeping Hours


Age in
(Months) Hours of Sleep, on average, each night. Gender
132 9 Female
133 8 Male
134 9 Female
136 8 Female
138 8 Male
140 9 Male


Table 2. Year 8 Student’s Sleeping Hours


Age in
(Months) Hours of Sleep, on average, each night. Gender
144 8 Male
146 8 Female
147 8 Female
149 7 Female
152 7 Male
154 8 Male


Table 3. Year 9 Student’s Sleeping Hours

Age in
(Months) Hours of Sleep, on average, each night. Gender
156 7 Female
161 7 Male
163 7 Female
163 8 Female
164 6 Male
166 8 Male


Table 4. Year 10 Student’s Sleeping Hours

Age in
(Months) Hours of Sleep, on average, each night. Gender
174 8 Female
175 7 Female
176 7 Male
176 6 Female
178 7 Male
179 7 Male


Table 5. Year 11 Student’s Sleeping Hours

Age in
(Months) Hours of Sleep, on average, each night. Gender
183 6 Female
184 7 Male
186 7 Male
187 6 Female
188 5 Female
191 5 Male


Table 6. Year 12 Student’s Sleeping Hours

Age in
(Months) Hours of Sleep, on average, each night. Gender
196 5 Female
198 5 Male
199 5 Male
199 6 Male
200 6 Female
203 5 Female


Table7. Year 13 Student’s Sleeping Hours

Age in
(Months) Hours of Sleep, on average, each night. Gender
209 3 Female
212 5 Female
213 3 Female
215 5 Male
218 3 Male
220 4 Male

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