INSTRUCTION
You are supposed to create a folder on the desktop with your index number and computer number (where applicable) example: 01100054 D 001 . Use SPSS for the data analysis and copy only relevant output to Microsoft office for your write ups.
Save your write-ups with your index number.
QUESTION 4
[20 MARKS]
Are a person's brain size and body size predictive of his or her intelligence? In answering the above research question, some researchers (Willerman, et al, 1991) collected the following data ("Intelligence") on a sample of \( n=38 \) college students as saved on your desktop computer.
Response (y): Performance IQ scores (PIQ) from the revised Wechsler Adult Intelligence Scale. This variable served as the investigator's measure of the individual's intelligence.
Potential predictor \( \left(x_{1}\right) \) : Brain size based on the count obtained from MRI scans (given Weight in pounds.
Using the information and the data provided answer the following questions:
i. Run descriptive statistics analysis on the variables in the dataset and comment on the mean and standard deviation of cach variable \( 2 \mathrm{mks} \)
ii. Examine the normality (using descriptive techniques) of each variable in the dataset and comment on the result. \( 2 m k s \)
iii. Perform correlation analysis among the study variables and comment on the association between PIQ and Brain Size and Height. \( 3 \mathrm{mks} \)
iv. What statistical technique would lead you to examine the variation in the intelligence score? Imk
v. State any two-assumptions underlying the procedure as stated in (iv) \( 2 \mathrm{mks} \)