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CShowe work and write theanswer) (8) The diameters of bolts produced by a certain machine are...
A) The diameters of pencils produced by a certain machine are normally distributed with a mean...
A) The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What is the probability that the diameter of a randomly selected pencil will be between 0.21 and 0.29 inches? B) The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What is the probability that the diameter of a...
Question 7 20 pts The diameters of bolts produced by a certain machine are normally distributed...
Question 7 20 pts The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What is the probability that a randomly selected bolt will have a diameter greater than 0.32 inches? (write your answer rounded to 4 decimal places) 0.0228 Question 15 20 pts Use the given data to find the equation of the regression line. Round the final values to three places, if necessary...
1) We know that z has a standard normal distribution with a mean of 0 and...
1) We know that z has a standard normal distribution with a mean of 0 and standard deviation of 1. The probability that z is less than 1.15 is . Use your z-table and report your answer to four decimal places. 2)A sample of 15 grades from a recent Stats exam has a mean of 69.3 points (out of a possible 100 points) and a standard deviation of 16.5 points. Calculate the z-score for the student who scored 74.1 points on...
The diameters (in inches) of 1717 randomly selected bolts produced by a machine are listed. Use...
The diameters (in inches) of 1717 randomly selected bolts produced by a machine are listed. Use a 9595% level of confidence to construct a confidence interval for (a) the population variance sigma squaredσ2 and (b) the population standard deviation sigmaσ. Interpret the results. 4.4684.468 4.4364.436 4.0234.023 4.3134.313 4.0064.006 3.7783.778 3.8283.828 3.7473.747 4.2374.237 3.9393.939 4.1274.127 4.5734.573 3.9743.974 3.7573.757 3.8733.873 3.8143.814 4.4294.429 (a) The confidence interval for the population variance is
4. Consider normally distributed diameters of bolts. If mean diameter is 6.10 mm with standard deviation...
4. Consider normally distributed diameters of bolts. If mean diameter is 6.10 mm with standard deviation of 0.15 mm, determine the probability of diameter being between 5.992 mm and 5.995 mm.
Nuts and bolts are made separately and paired at random. Thus, the diameters can be considered...
Nuts and bolts are made separately and paired at random. Thus, the diameters can be considered independent random variables. The diameter of the nut is normally distributed with a mean of 20.8 mm and a standard deviation of 0.3 mm. The diameter of the bolt is normally distributed with a mean of 20.0 mm and a standard deviation of 0.2 mm. a. Find the mean and standard deviation of the difference in diameter between the nut and the bolt. b....
The diameters n inches) of 17 randomly selected bolts produced by a machine are listed. Use...
The diameters n inches) of 17 randomly selected bolts produced by a machine are listed. Use a 90% level of confidence to construct a confidence interval for population variance ơ2 and (b) the population standard deviation ơ. Interpret the results. a the 4.481 4411 4003 4329 4004 3797 3806 3.775 4 223 3.986 4.153 4.565 3938 3.753 3.865 3.814 4.457 () The confidence interval for the population variance is (Round to three decimal places as needed.)
4 . A machine makes spherical balls. Diameters X are normally distributed with mean 240.0 mm...
4 . A machine makes spherical balls. Diameters X are normally distributed with mean 240.0 mm and standard deviation 3.0 mm. Another machine, working independently, makes sockets with diameters Y that are normally distributed with mean 249.0 mm and standard deviation 4.0 mm. A ball will fit into the socket only if ; otherwise the ball is too big for the socket. Define the “gap” to be the difference between the socket diameter and the ball diameter. Therefore a ball...
Use your calculator to determine the probabilities. State what you put in for the lower limit,...
Use your calculator to determine the probabilities. State what you put in for the lower limit, upper limit, mean and standard deviation. 1. Maple tree diameters in a forest area are normally distributed with mean 10 inches and standard deviation 2.5 inches. Find the percentage of trees having a diameter greater than 11 inches 2.White blood cell (WBC) count per cubic millimeter of whole blood follows approximately a Normal distribution with mean 7500 and standard deviation of 1750. What percentage...
Section MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question....
Section MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question. Using the following uniform density curve, answer questions 1 and 2 T Pd 125 1) What is the probability that the random variable has a value greater than 32 A) 0.575 1) g0625 B) 0500 D) 0.750 2) What is the probability that the random variable has a value between 0.1 and 0.8? A) 0.213 2) B) 0.088 90338 D) 0.038 Find the indicated...
Question 7 20 pts The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What is the probability that a randomly selected bolt will have a diameter greater than 0.32 inches? (write your answer rounded to 4 decimal places) 0.0228 Question 15 20 pts Use the given data to find the equation of the regression line. Round the final values to three places, if necessary...
4. Consider normally distributed diameters of bolts. If mean diameter is 6.10 mm with standard deviation of 0.15 mm, determine the probability of diameter being between 5.992 mm and 5.995 mm.
The diameters n inches) of 17 randomly selected bolts produced by a machine are listed. Use a 90% level of confidence to construct a confidence interval for population variance ơ2 and (b) the population standard deviation ơ. Interpret the results. a the 4.481 4411 4003 4329 4004 3797 3806 3.775 4 223 3.986 4.153 4.565 3938 3.753 3.865 3.814 4.457 () The confidence interval for the population variance is (Round to three decimal places as needed.)
Section MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question. Using the following uniform density curve, answer questions 1 and 2 T Pd 125 1) What is the probability that the random variable has a value greater than 32 A) 0.575 1) g0625 B) 0500 D) 0.750 2) What is the probability that the random variable has a value between 0.1 and 0.8? A) 0.213 2) B) 0.088 90338 D) 0.038 Find the indicated...
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