A large departmental store, BOBO, has analyzed the monthly amount spent by its credit card customers and found that it is normally distributed with a mean of GHC 100 and a standard deviation of GHC 15.
Required:
Determine, the percentage of people who will spend:
(i) Over GHC 130. (2 Marks)
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(ii) Over GHC 120. (2 Marks)
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(iii) Below GHC 70. (2 Marks)
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(v) Between GHC 115 and GHC 130. (2 Marks)
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Calculate, the minimum amount spent of:
(vi) The top 10%. (2.5 Marks)
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(vii) The top 3% of customers. (2.5 Marks)