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Statistics 2 - Week 7
13Questions3Years
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Q1-Q1 of 9
Q1
Find the population standard deviation .
Comprehensionmedium3 marks
Q2
How does the expected value of the sample mean change?
Comprehensioneasy1 marks
Q3
How does the variance of the sample mean change?
Comprehensioneasy2 marks
Q4
A random sample of size is collected from a normal population with mean and variance . The expected value and variance of the sample mean are and . Find .
Integer answereasy3 marks
Q5
A certain type of thread is manufactured with a mean tensile strength of kilograms and a standard deviation of kilograms. If the variance of the sample mean for a sample size of is and the variance of the sample mean for a sample size of is , then find an approximate value for .
Integer answermedium3 marks
Q6
Compute empirical distribution of the sample.
Comprehensioneasy1 marks
Q7
Compute distribution mean. Enter the answer correct to one decimal place.
Comprehensioneasy1 marks
Q8
Compute sample mean. Enter the answer correct to one decimal place.
Comprehensioneasy1 marks
Q9
Compute the expected value and variance of the sample mean .
Comprehensioneasy2 marks
Showing 9 questions.