14 A retail company has 5200 employees in 100 stores throughout the United Kingdom. The company recently introduced a new reward scheme for its staff.
The management team wanted to sample the staff to find out their opinions of the new scheme. Three possible sampling methods were suggested:
Method A Choose 100 people who work at the largest store
Method B Choose one person at random from each of the 100 stores
Method C List all employees in alphabetical order and assign each a number from 1 to 5200 Choose a random number between 1 and 52
Choose this person and every 52nd person on the list thereafter. 14

1. Give one disadvantage of using Method A compared with using Method B.
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2. Give one advantage of using Method B compared with using Method C.
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3. 1. Identify the method of sampling used in Method C .
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4. (ii) Give a reason why Method C does not provide a random sample.