A manufacturer produces widgets whose lengths are normally distributed with a mean of 6.8 cm and...
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
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A manufacturer produces widgets whose lengths are normally
distributed with a mean of 6.8 cm and...
A manufacturer produces widgets whose lengths are normally distributed with a mean of 9.9 cm and...
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.
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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 176.1-cm and a standard deviation of 2.1-cm. For shipment, 23 steel rods are bundled together.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 176.1-cm and a standard deviation of 2.1-cm. For shipment, 23 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is greater than 177.1-cm.P(M > 177.1-cm) =
A company produces steel rods. The lengths of the steel rods are normally distributed with a...
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 98.6-cm and a stan...
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 98.6-cm and a standard deviation of 2.1-cm. For shipment, 13 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 99.2-cm and 99.3-cm. P(99.2-cm<M< 99.3-cm) = Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are...
The lengths of pregnancies are normally distributed with a mean of 269 days and a standard...
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...
Question 1 A manufacturer knows that their items have a lengths that are approximately normally distributed,...
Question 1 A manufacturer knows that their items have a lengths that are approximately normally distributed, with a mean of 16.7 inches, and standard deviation of 2.7 inches. If 41 items are chosen at random, what is the probability that their mean length is greater than 16.7 inches? (Round answer to four decimal places) Question Help: Message instructor Submit Question
A company produces steel rods. The lengths of the steel rods are normally distributed with a...
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 93.4- cm and a standard deviation of 0.6-cm. Find the proportion of steel rods with lengths between 92 cm and 95.1 cm. Enter your answer as a number accurate to 4 decimal places. A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 155.6-cm and a standard deviation of 2-cm. A steel rod is...
A company produces steel rods. The lengths of the steel rods are normally distributed with a...
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 172.4-cm and a standard deviation of 1.4-cm. For shipment, 28 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is less than 172.9-cm. P(M < 172.9-cm) =
The lengths of lumber a machine cuts are normally distributed with a mean of 89 inches...
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 98.6-cm and a standard deviation of 2.1-cm. For shipment, 13 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 99.2-cm and 99.3-cm. P(99.2-cm<M< 99.3-cm) = Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are...
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...
Question 1 A manufacturer knows that their items have a lengths that are approximately normally distributed, with a mean of 16.7 inches, and standard deviation of 2.7 inches. If 41 items are chosen at random, what is the probability that their mean length is greater than 16.7 inches? (Round answer to four decimal places) Question Help: Message instructor Submit Question
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 93.4- cm and a standard deviation of 0.6-cm. Find the proportion of steel rods with lengths between 92 cm and 95.1 cm. Enter your answer as a number accurate to 4 decimal places. A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 155.6-cm and a standard deviation of 2-cm. A steel rod is...
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