Question
The manufacturer of a certain electronic component claims that they are designed to last just slightly more than 4 years because they believe that customers
The manufacturer of a certain electronic component claims that they are designed to last just slightly more than 4 years because they believe that customers typically replace their device before then. Based on information provided by the company, the components should last a mean of 4.24 years with a standard deviation of 0.45 years. For this scenario, assume the lifespans of this component follow a normal distribution. Use this scenario for problems 9 - 13.
A journalist believes that, in reality, these components have a shorter lifespan than what the company is reporting. He tests a random group of 35 of these components and finds a mean lifespan of 4.05 years.
What is the standard error of the sampling distribution when 35 random components are tested?
Round your answer to three decimal places.
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