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A machine makes car wheels and in a random sample of 26 wheels, the test statistic is found to be 3.07. As per the t-distribution test (of 5% level of significance), what can you say about the quality of wheels produced by the machine? (Use t25(0.05) = 2.06)

a) Superior quality

b) Inferior quality

c) Same quality

d) Cannot say

1 Answer

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Best answer

Correct option is b) Inferior quality

n = 26 ⇒ |t| = 3.07 > t25(0.05) = 2.06

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