A synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean...
A synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. Let X = tensile strength of the synthetic fiber from a fiber specimen used in carpet manufacturing (in psi). Suppose you randomly pick a sample of n = 36 fiber specimens and perform tensile testing on them. (round 5 decimal places) a.) For n = 36 fiber specimens, what's the probability that the average tensile strength of all...
a synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed usted with mean 75.5 psi and standard deviation 3.5 psi. find the probability that a random sample n=6 fiber specimens will have sample mean tensile strength that is between 75.25 and 75.75 psi
7-5. A synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 520 KN/m² and standard deviation 25 KN/m². Find the probability that a ran- dom sample of n= 6 fiber specimens will have sample mean tensile strength that exceeds 525 KN/m².
7-5. A synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 520 KN/m2 and standard deviation 25 KN/m2. Find the probability that a ran dom sample of n=6 fiber specimens will have sample mean tensile strength that exceeds 525 KN/m2 7-6. Consider th symtretie iber inr the previous exercise fHow
The tensile strength, X, of a tungsten component is normally distributed with a mean of 546 grams per square centimeter (gscm) and a standard deviation of 50 gscm. a)Calculate the variance of X/50 1 b) Calculate the variance of 5X 3. 6250 c) Calculate the probability that the tensile strength of a tungsten component is at least 500 gscm? .8212 d) What is the probability that X is within 1 standard deviation of its mean? 6827 e) What is the...
QUESTION 1 1 points Saved Copy of A research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 36 tires and tested them to end-of life in a road test. The sample mean and standard deviation are 66 and 2.1 thousand kilometers. Find a 99% upper bound for the mean life in road test. (round the answer to three digits) 67.853 QUESTION 2 1 points Saved A synthetic fiber used in manufacturing...
An engineer studying the tensile strength of a composite material knows that tensile strength is approximately normally distributed with σ = 60 psi. A random sample of 20 specimens has a mean tensile strength of 3450 psi. (a) Test the hypothesis that the mean tensile strength is 3500 psi, using α = 0.01 (b) What is the smallest level of significance at which you would be willing to reject the null hypothesis? (c) What is the β error for 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 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...
The fiber-spinning process currently produces a fiber whose strength is normally distributed with a mean of 75 N/m2 and a standard deviation of 8 N/m2. a. Find the probability that the strength of a randomly chosen fiber has a strength greater than 80 N/m2 b. Find the probability that the strength of a randomly chosen fiber has a strength between 71 N/m2 and 86 N/m2 c. Find the top 15% strongest fibers
3. Problem 3: The tensile strength for a type of wire is normally distributed with unknown mean i and unknown variance o?. Six pieces of wire are randomly selected from a large roll: Y! the tensile strength for portion i, is measured for i=1,2,...,6. The population mean ji and variance o2 can be estimated by Y and S, respectively. Find the probability that Y will be within 2S/n of the true population mean . wwwtalib