Suppose that 8 short range rockets of one kind have a mean target error of x₁ = 98 metres with a standard deviation of s₁ = 18 metres while 10 rockets of another kind have a mean target error of x₂ = 76 with standard deviation of s₂ = 15 metres.
Assume that the target errors for the two types of rockets are normally distributed and that they have a common variance.
Find the p-value of the test.
A. 0.2
B. 0.1
C. 0.5
D. 0.4
E. 0.3
