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Sleep and IQ

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Da'Quan Smalls

on 10 December 2014

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Transcript of Sleep and IQ

Sleep and Cognitive Performance
Da'Quan Smalls
Ama Kusi
AAron Capitel
Question?
Does the amount of sleep have an affect on the score of an IQ exam?
Background
As students we are told that sleep can affect our academic performance.
The sleepier you are the less alert you are and your decision making abilities suffer because of sleepiness.
regardless of why you get the amount of sleep you do, can that amount of sleep affect your scores on an exam that you cannot study for??
Procedure
We asked 25 people (10 Males and 15 Females) to take an online IQ test of our choosing
After taking the test, the subjects were asked for their score and the average hours of sleep they get a night
IQ Score Gender Hours
136 F 5.0
126 F 5.0
112 F 7.0
137 F 8.0
113 F 5.0
112 F 5.0
122 F 5.5
117 F 7.0
109 F 5.0
140 F 7.0
142 F 8.0
125 F 7.0
146 M 7.0

Results
117 F 6.0
122 M 8.0
129 M 7.0
139 M 8.0
115 F 8.0
140 M 9.0
140 F 7.5
125 M 7.0
142 M 8.5
163 M 7.0
135 M 6.0
140 M 7.0

Statistical Analysis
One Way Anova and
Kruskal-Wallis test
Residuals
Problems??
finding a relieable IQ test
it was pretty easy to find an IQ test online(google) but how does that score measure with a real IQ test
genius is 120
according to our test the majority of our subjects are geniuses(which is very unlikely)
Our sample wasn't truly random
we found ourselves asking people we knew(roomates, friends, classmates, and teammates) to have people take the test
Analysis of Variance

Source DF Adj SS Adj MS F-Value P-Value
Hours 7 1108 158.3 0.83 0.579
Error 17 3251 191.2
Total 24 4359


Due to the high p-value, we fail to reject the H0. Due to the results of our study, we can conclude that sleep does not have an effect on cognitive ability.
errors??
possibly type II
The End

Thank you for your time
Due to our findings, we fail to reject the null. Stating that Sleep does not have any affect on congnititve performance. However, other more professional sources more than likely have data that does support this claim.
H0:The mean scores for each hour interal are equal
Ha: At least one of the means scores is different
Hours N Median Ave Rank Z
5.0 5 113.0 6.9 -2.07
5.5 1 122.0 8.5 -0.62
6.0 2 126.0 10.3 -0.55
7.0 9 129.0 14.6 0.79
7.5 1 140.0 19.5 0.90
8.0 5 137.0 13.8 0.27
8.5 1 142.0 22.5 1.32
9.0 1 140.0 19.5 0.90
Overall 25 13.0

H = 7.78 DF = 7 P = 0.353
H = 7.82 DF = 7 P = 0.349 (adjusted for ties)

* NOTE * One or more small samples
Originally we ran a one way ANOVA but due to the sample size and high p-value, we decided to run the Kruskal-Wallis test
ASSUMPTIONS
Samples are selceted randomly and independnly from the respective population
Sample variances are equal
sample probability distributions are normal
*due to small sample size and unequal variances, we used Kruskal Wallis test
Hours N Median Ave Rank Z
5.0 5 113.0 6.9 -2.07
5.5 1 122.0 8.5 -0.62
6.0 2 126.0 10.3 -0.55
7.0 9 129.0 14.6 0.79
7.5 1 140.0 19.5 0.90
8.0 5 137.0 13.8 0.27
8.5 1 142.0 22.5 1.32
9.0 1 140.0 19.5 0.90
Overall 25 13.0

H = 7.78 DF = 7 P = 0.353
H = 7.82 DF = 7 P = 0.349 (adjusted for ties)

* NOTE * One or more small samples
(failure to reject a false H0
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