(a)[1]
Explain briefly whether he should use a one-tail test or a two-tail test.
(b)[3]
Carry out the test at the $1\%$ significance level.
Mathematics 9709 · AS & A Level · Hypothesis testing
Hypothesis testing — practice question
An architect wants to find out whether, on average, the buildings in one city are taller than those in other cities. He draws a large random sample of buildings from the city and calculates the mean height of the sample. He works out the test statistic, $z$, and obtains $z = 2.41$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Use a one-tailed test because the question is about whether it is 'higher'” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI