In a manufacturing process a random sample of 9 bolts manufactured has a mean length of 3 inches with a variance of .09.What is the 90% confidence interval for the true mean length of the bolt?
A) 2.8355 to 3.1645
B) 2.5065 to 3.4935
C) 2.4420 to 3.5580
D) 2.8140 to 3.8160
E) 2.9442 to 3.0558
Correct Answer:
Verified
Q5: When the level of confidence and sample
Q18: The width of a confidence interval will
Q20: The t distribution approaches the _ as
Q21: When the level of confidence and sample
Q22: A Research and Development Laboratory researcher for
Q24: When solving for the sample size needed
Q25: In a manufacturing process,we are interested in
Q26: When the sample size and the sample
Q27: In a manufacturing process a random sample
Q28: When the level of confidence and sample
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents