(1 point) An automatic machine in a manufacturing process is operating properly if the lengths of...
An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 111 cm and a standard deviation of 5.5 cm. A. Using Excel, find the probability that one selected subcomponent is longer than 113 cm. Probability = B. Using Excel, find the probability that if 3 subcomponents are randomly selected, their mean length exceeds 113 cm. Probability =
Ch 7.2: Distribution of the Sample Mean and the ROBLEMS INSTRUCTIONS 4-6 points n automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent ae normally distributed with a mean of 117 cm and a standard deviation of 4.7 cm A. Find the probability that one selected subcomponent is longer than 119 cm. Probability B. Find the probability that if 3 subcomponents are randomly selected, their mean length exceeds 119 cm. Probability C. Find...
An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed, with mean 117 cm and standard deviation 2.1 cm. If three units are selected at random find the probability that exactly two have lengths exceeding 120 cm. (Round your answer to 4 decimal places)
The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 308 days or longer. b. If the length of pregnancy is in the lowest 4%, then the baby is premature. Find the length that separates premature babies from those who are not premature. Click to view page 1 of the table. Click to view page 2 of the table. a. The probability...
1. When a manufacturing process is operating properly, the mean length of a certain part is known to be 6.175 inches, and lengths are normally distributed. The standard deviation of this length is 0.0080 inches. If a sample consisting of 6 items taken from current production has a mean length of 6.168 inches, is there evidence at the 5% level of significance that some adjustment of the process is required?
The lengths of lumber a machine cuts are normally distributed with a mean of 89 inches and a standard deviation of 0.3 inches. (a) What is the probability that a randomly selected board cut by the machine has a length greater than 89.11 inches? The probability is _____? (Round to four decimal places as needed.) (b) A sample of 42 boards is randomly selected. What is the probability that their mean length is greater than 89.11 inches? The probability is...
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 225.5-cm and a standard deviation of 2.2-cm. For shipment, 26 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is greater than 224.2-cm.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 231.1-cm and a standard deviation of 2-cm. For shipment, 25 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 230.5-cm and 230.6-cm.
Sugar canes have lengths, X, that are normally distributed with mean 365.45 centimeters and standard deviation 4.9 centimeters. What is the probability of the length of a randomly selected cane being between 360 and 370 centimeters? Round your answer to four decimal places.
5. Foot Lengths of Women Assume that foot lengths of women are normally distributed with a mean of 9.6 in. and a standard deviation of 0.5 in., based on data from the U.S. Army Anthro- pometry Survey (ANSUR) a. Find the probability that a randomly selected woman has a foot length less than 10.0 in b. Find the probability that a randomly selected woman has a foot length between 8.0 in. and 11.0 in. c. Find Pos d. Find the...