Specialist2025 NHT Exam 2 Section A · Q20CAS active1 mark
Difference of two sample means
Certain electronic components have resistances that can be assumed to be normally distributed with a mean of 1000 ohms and a standard deviation of 20 ohms. Two independent random samples of 25 of these components are taken and the sample mean for each is calculated.
What is the probability, correct to four decimal places, that the two sample means differ by less than 5 ohms?
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