- 14 Marks
QT – Nov 2018 – L1 – Q5b – Probability
Solve normal distribution problems related to spending habits of residents in Kojokrom.
Question
In a study commissioned by Ofo Stores, the researcher examined the spending habits of the residents of Kojokrom. He found the spending habits to be normally distributed with a mean of GH¢700 and a standard deviation of GH¢70.
Required:
i) Determine the probability that a resident selected at random spends:
- Less than GH¢620 (3 marks)
- More than GH¢1,000 (3 marks)
- Between GH¢800 and GH¢900 (4 marks)
ii) Calculate the amount:
- Above which 80% of the residents will spend in a week (2 marks)
- Below which 30% of the residents will spend in a week (2 marks)
Find Related Questions by Tags, levels, etc.
- Tags: Continuous Variables, Normal distribution, Probability, Spending Habits, Statistics
- Level: Level 1
- Topic: Probability
- Series: NOV 2018
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