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
The fiber-spinning process currently produces a fiber whose strength is normally distributed with a mean of...
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
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.
1)The breaking strengths of nylon fibers in dynes are normally distributed with a mean of 12058 and a variance of 200043. What is the probability that a fiber strength is less than 12550? Round your answers to the nearest thousandth. 2) The breaking strengths of nylon fibers in dynes are normally distributed with a mean of 12313 and a variance of 200610. What is the probability that a fiber strength is between12453 and 13977? Round your answers to the nearest...
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. Suppose we measure the sample mean for n independent samples How is the variance of the sample mean changed when the sample size is increased from n-9 to n 36? What does this imply about the relationship between sample size and our estimate of the mean (sample mean here)?
A manufacturer produces widgets whose lengths are normally distributed with a mean of 6.8 cm and standard deviation of 2.1 cm. A. If a widget is selected at random, what is the probability it is greater than 6.8 cm.?_____ B. What is the standard deviation of the average of samples of size 36 ?______ C. What is the probability the average of a sample of size 36 is greater than 6.8 cm?_______ Round answer to four decimal places
A manufacturer produces widgets whose lengths are normally distributed with a mean of 9.9 cm and standard deviation of 3.7 cm. A. If a widget is selected at random, what is the probability it is greater than 9.7 cm.? B. What is the standard deviation of the average of samples of size 41 ? C. What is the probability the average of a sample of size 41 is greater than 9.7 cm? Round answer to four decimal places.
A manufacturer produces widgets whose lengths are normally distributed with a mean of 17.3 cm and standard deviation of 2 cm. A. If a widget is selected at random, what is the probability it is greater than 17.4 cm.? Round to dour decimal places B. What is the standard deviation of the average of samples of size 32 ? Round answer to four decimal places C. What is the probability the average of a sample of size 32 is greater...
The breaking strength X of a certain rivet used in a machine engine is normally distributed with mean 5000 psi and standard deviation 400 psi. Find the probability that the difference (in absolute value) between a randomly chosen rivet and the mean is within 250 psi.