Question text
A manufacturer of car batteries claims that his
product will last at least 4 years on average. A sample of 41 is
taken and the mean and standard deviation are found. The test
statistic is calculated to be -1.656. Using a 5% level,
a) Specify the null
and alternative hypothesis?
b) What is the appropriate test
statistic?
c) What is the final decision
(accept or reject the null hypothesis)?
Question text A manufacturer of car batteries claims that his product will last at least 4 years on average. A sample of
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