Question
In an investigation into ownership of laptops among school students, 200 randomly chosen studens were interviewed.It is found that 140 of them owned a laptop.
In an investigation into ownership of laptops among school students, 200 randomly chosen studens were interviewed.It is found that 140 of them owned a laptop.
(a) Find the 99% confidence interval for the proportion of all school students owning a laptop.
(5 marks)
(b) Test, at 5% level of significance, whether the proportion of school students owning a laptop is less than 75%.
(8 marks)
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Principles Of Economics
Authors: OpenStax
2nd Edition
1506699863, 978-1506699868
