a) In a random sample of 20 second year statistics students from a normal distribution, N (μ,σ²) selected by a lecturer, found that Σ?1 X = 30 and E1 x? = 60. ii) If the lecturer assumes that μ is unknown, what will be her 90% two sided confidence interval for o²?
a) In a random sample of 20 second year statistics students from a normal distribution, N (μ,σ²) selected by a lecturer, found that Σ?1 X = 30 and E1 x? = 60. ii) If the lecturer assumes that μ is unknown, what will be her 90% two sided confidence interval for o²?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Question
6.STATISTICAL INFERENCE
Question 3 a ii)
Transcribed Image Text:a)
In a random sample of 20 second year statistics students from a normal distribution, N (μ, 0²)
selected by a lecturer, found that
20
Σ1 X = 30 and 21x? = 60.
ii) If the lecturer assumes that u is unknown, what will be her 90% two sided confidence interval
for o²?
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