How does smoking marijuana affect willingness to work? Canadian researchers pers

Question

How does smoking marijuana affect willingness to work? Canadian researchers persuaded people who used marijuana to live for 98 days in a "planned environment". The subjects earned money by weaving belts. They used their earnings to pay for meals and other consumption and could keep any money left over. One group smoked two potent marijuana cigarettes every evening. The other group smoked two weak marijuana cigarettes. All subjects could buy more cigarettes but were given strong or weak cigarettes, depending on their group. Did the weak and strong groups differ in work output and earnings?^11 Outline the design of this experiment. Here are the names of the 20 subjects. Use software or Table B at line 101 to carry out the randomization your design requires.

Explanation / Answer

Solution :

(a) This experiment has one factor : strength of the cigarettes. The response is work output. There are two levels of the factor : strong and weak cigarettes and therefore two treatments. An equal number of young men should be randomly assigned to each one of the treatments (strong or weak cigarettes) and the work output would be measured for each one of the young men.

(b)   We label the experimental units 01, 02, . . . , 20 in this order following the first column, the second, third and fourth. We then slice the string of digits given in Table B, starting at line 101 into slices of two digits. As soon as encore any of the labels in these slices, we assign the person with that label to the first treatment until we have 10 experimental units for the first treatment. Then we assign them to the second treatment

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