Assume that the fracture resistance of a wire used in the manufacture of drapery is normally...

Question

Question

$Assume that the fracture resistance of a wire used in the manufacture of drapery is normally distributed with o2 = 2. A rando$

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

solutions Given a: 98 o 2:2 ooa: 1.4142 Bandom sample n:25 ad ast Confidence interval Zale : 1.96 20.025 Confidence intewa Pa

Add a comment

Answer 2

Similar Homework Help Questions

Assume that the fracture resistance of a wire used in the manufacture of drapery is normally...

Assume that the fracture resistance of a wire used in the manufacture of drapery is normally distributed with 2 = 2. A random sample of 25 specimens have been examined and they yielded a mean resistance of x = 98 psi. Give a 95% confidence interval for the mean resistance. A. [97.216,98.784] B. [97.216,98.554] C. [97.456,98.784] D. [97.446,98.554] E. none of the preceding Assume that the fracture resistance of a wire used in the manufacture of drapery is normally distributed...
Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is...

Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that o = 2 psi. A random sample of 8 specimens is tested, and the average breaking strength is found to be 97 psi. Find a 95% two-sided confidence interval on the true mean breaking strength. Round the answers to 1 decimal place. Sus
Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is...

Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that σ = 7.2 psi. A random sample of nine specimens is tested, and the average breaking strength is found to be 95.5 psi. The 95% confidence interval for the true mean breaking strength is written as (A ; B). Find the value of B? round your answer to three digits.

Question 7 The mean breaking strength of yarn used in manufacturing drapery material is required to...

Question 7 The mean breaking strength of yarn used in manufacturing drapery material is required to be more than 100 psi. Past experience has indicated that the standard deviation of breaking strength is 2.9 psi. A random sample of 9 specimens is tested, and the average breaking strength is found to be 100.6 psi. Statistical Tables and Charts (a) Calculate the P-value. Round your answer to 3 decimal places (e.g. 98.765). If a = 0.05, should the fiber be judged...
Previous experience has shown that the breaking strength of the fabric used in a certain brand...

Previous experience has shown that the breaking strength of the fabric used in a certain brand of drapes is normally distributed with a standard deviation of 2 pounds per square inch. A random sample of 25 specimens is examined to reveal an average breaking strength of a 98 pounds per square inch. Determine the p-value required to test the hypothesis that the true mean is not 97 A. 0.067 B. 0.012 C. 0.13 D. 0.006 E. none of the preceding
Previous experience has shown that the breaking strength of the fabric used in a certain brand...

Previous experience has shown that the breaking strength of the fabric used in a certain brand of drapes is normally distributed with a standard deviation of 2 pounds per square inch. A random sample of 25 specimens is examined to reveal an average breaking strength of 1 = 98 pounds per square inch. Determine the p-value required to test the hypothesis that the true mean is not 97. A. 0.067 B. 0.012 C. 0.13 D. 0.006 E. none of the...

Pr。Ыет 12. An engineer who is studying the tensile strength of a steel alloy intended for use in golf club shafts knows that tensile strength is approximately normally distributed. A random sample o...

Pr。Ыет 12. An engineer who is studying the tensile strength of a steel alloy intended for use in golf club shafts knows that tensile strength is approximately normally distributed. A random sample of 12 specimens has a mean tensile strength of 3250 psi and a sample standard deviation of 8-60 psi. a) Test the hypothesis that mean strength is 3500 psi. Use α-001. b) What is the smallest level of significance at which you coulji be willing to reject the...
A simple random sample of size n is drawn from a population that is normally distributed....

A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x̅, is found to be 107 , and the sample standard deviation, s, is found to be 10 .(a) Construct a 98 % confidence interval about μ if the sample size, n, is 22 .(b) Construct a 98 % confidence interval about μ if the sample size, n, is 12 .(c) Construct a 95 % confidence interval about μ if the...
QUESTION 9 1 points Save Answer Past experience has indicated that the breaking strength of yarn...

QUESTION 9 1 points Save Answer Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that ơ-6.2 psi A randorm sample of nine specimens is tested, and the average breaking strength s found to be 7 psi The 95% confidence interval for the truc mean breaking strength is written as (A ; B). Find the value of A? round your answer to three digits. QUESTION 10 1 points Save Answer...

Problem (20 points, 5 points for each part . The modules of rupture (MOR) for a particular grade ...

Problem (20 points, 5 points for each part . The modules of rupture (MOR) for a particular grade of pencil lead is known to have a standard deviation of 250 psi. (1) A random sample of 16 pencil leads yielded a sample mean of 6490. Construct a 95% confidence interval (two-sided) for the true mean MOR. (2) A random sample of25 pencil leads yielded a sample mean of6520. Construct a 98% upper (3) Find the sample size required to estimate...

Assume that the fracture resistance of a wire used in the manufacture of drapery is normally...

Homework Answers