is a normally distributed random variable with unknown mean and standard deviation equal to 2. The value of the sample mean from a random sample of size 25 is 10. Which of the following values lie within the 95% confidence interval for ?
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X is a normally distributed random variable with unknown mean μ and standard deviation equal to 2. The value of the sample mean from a random sample of size 25 is 10. Which of the following values lie within the 95% confidence interval for μ? (A) 9.3 (B) 9.8 (C) 10.6 (D) All of the above
Also written as: X is a normally distributed random variable with unknown mean mu and standard deviation equal to 2. The value of the sample mean from a random sample of size 25 is 10. Which of the following values lie within the 95% confidence interval for mu?
Point and interval estimation has come up 28 times in 6 exams since 2008.
This question is on Confidence intervals, part of Point and interval estimation in Statistics.
Ranges that capture a parameter with a stated confidence level.
TestStop has 10 past-paper questions on this subtopic.
Question from the DSE 2012 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.