CAPE Applied Mathematics Unit 1 · 2014 · Paper 1 · Question Q35
A t-test is used to test a company's claims that its watch batteries last an average of 7 years. A sample of 10 of the company's watch batteries has a mean life of 6.75 years and a standard deviation of 0.5 years. The value of the test statistic is approximately
- (A)
t = -1.6 - (B)
t = -3 - (C)
t = -4.5 - (D)
t = -5
The answer is shown once you've answered.
Practise this question