A certain brand of concrete has a compressive strength that is normally distributed with a mean...
A certain brand of concrete has a compressive strength that is normally distributed with a mean of 2500 psi and a standard deviation of 50 psi. What is the probability that a random sample of 16 specimen will have a mean strength greater than 2490 psi?Round answer to 4 significant figures in the format (INCLUDE the 0 before the decimal points in call probability answers!): 0.1234
A random sample of 16 specimen are analyzed. What value of compressive strength will 94.95% of the samples exceed? This is not a probability this is a value for the random variable x. Round answer to 5 significant figures in the format leaving a space in between the number and the unit: 1234.5 psi
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A certain brand of concrete has a compressive strength that is
normally distributed with a mean...
The comprehensive strength of concrete is normally distributed with u = 2500 psi and o =...
The comprehensive strength of concrete is normally distributed with u = 2500 psi and o = 50 psi. Find the probability that a random sample of n = 5 specimens will have a sample mean diameter that falls in the interval from 2499 psi to 2510 psi. Express the final answer to three decimal places (e.g. 0.987).
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...
Math 333 ASAP plz The comprehensive strength of concrete is normally distributed with μ = 2500...
Math 333 ASAP plz The comprehensive strength of concrete is normally distributed with μ = 2500 psi and σ = 50 psi. Find the probability that a random sample of n = 5 specimens will have a sample mean diameter that falls in the interval from 2499 psi to 2510 psi. Express the final answer to three decimal places (e.g. 0.987).
A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The...
A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength μ greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1356 kPa and their standard deviation is 70 kPa. A test is made of H0 : µ ≤ 1350 versus H1 : µ > 1350. a. Find the P-value. Round...
A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The...
A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength μ greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1356 kPa and their standard deviation is 70 kPa. A test is made of H0 : µ ≤ 1350 versus H1 : µ > 1350. a. (True or False) The...
The breaking strength of a certain rivet used in a machine engine is normally distributed with...
The breaking strength of a certain rivet used in a machine engine is normally distributed with mean 5500 psi and standard deviation 307 psi. A random sample of 16 rivets is taken. What is the probability that the sample mean falls between 5456.25 psi and 5566.01 psi?
Consider a study to determine the compressive strength of concrete blocks used for paving Two methods...
Consider a study to determine the compressive strength of concrete blocks used for paving Two methods of manufacturing concrete blocks are under investigation-method 1 (which is more expensive) and method 2. Research indicates that the greater the compressive strength of concrete, the greater the durability of a concrete block. Therefore the question is which if either, of the two methods produces greater compressive strength. In addition, the manufacturer considers that an average difference between the methods of less than 500...
Consider a study to determine the compressive strength of concrete blocks used for paving Two methods...
Consider a study to determine the compressive strength of concrete blocks used for paving Two methods of manufacturing concrete blocks are under investigation- method 1 (which is more expensive) and method 2. Research indicates that the greater the compressive strength of concrete, the greater the durability of a concrete block. Therefore the question is which one, if either, of the two methods produces greater compressive strength. In addition, the manufacturer considers that an average difference between the methods of less...
---------------------------------------------------------------------------- ! Required information A new concrete mix is being designed to provide adequate compressive strength...
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! Required information A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength y greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1353 kPa and their standard deviation is 74 kPa. A test is made of Ho: 415 1350 versus Hy: /> 1350. Find the P-value. Round the...
The weights of a certain brand of candies are normally distributed with a mean weight of...
The weights of a certain brand of candies are normally distributed with a mean weight of 0.8614 g and a standard deviation of 0.0511 g. A sample of these candies came from a package containing 447 candies, and the package label stated that the net weight is 381.4 g. (lf every package has 447 candies, the mean weight of the candies must exceed 381.4 0.8532 g for the net contents to weigh at least 381.4 g.) 447 a. If 1...
The comprehensive strength of concrete is normally distributed with u = 2500 psi and o = 50 psi. Find the probability that a random sample of n = 5 specimens will have a sample mean diameter that falls in the interval from 2499 psi to 2510 psi. Express the final answer to three decimal places (e.g. 0.987).
The breaking strength of a certain rivet used in a machine engine is normally distributed with mean 5500 psi and standard deviation 307 psi. A random sample of 16 rivets is taken. What is the probability that the sample mean falls between 5456.25 psi and 5566.01 psi?
Consider a study to determine the compressive strength of concrete blocks used for paving Two methods of manufacturing concrete blocks are under investigation-method 1 (which is more expensive) and method 2. Research indicates that the greater the compressive strength of concrete, the greater the durability of a concrete block. Therefore the question is which if either, of the two methods produces greater compressive strength. In addition, the manufacturer considers that an average difference between the methods of less than 500...
Consider a study to determine the compressive strength of concrete blocks used for paving Two methods of manufacturing concrete blocks are under investigation- method 1 (which is more expensive) and method 2. Research indicates that the greater the compressive strength of concrete, the greater the durability of a concrete block. Therefore the question is which one, if either, of the two methods produces greater compressive strength. In addition, the manufacturer considers that an average difference between the methods of less...
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! Required information A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength y greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1353 kPa and their standard deviation is 74 kPa. A test is made of Ho: 415 1350 versus Hy: /> 1350. Find the P-value. Round the...
The weights of a certain brand of candies are normally distributed with a mean weight of 0.8614 g and a standard deviation of 0.0511 g. A sample of these candies came from a package containing 447 candies, and the package label stated that the net weight is 381.4 g. (lf every package has 447 candies, the mean weight of the candies must exceed 381.4 0.8532 g for the net contents to weigh at least 381.4 g.) 447 a. If 1...
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