The lengths of the sardines received by a cannery have a mean of 4.64 inches and...
(3 pts) The lengths of the sardines received by a certain cannery are normally distributed with mean 4.62 inches and a standard deviation 0.23 inch. What percentage of all these sardines is between 4.35 and 4.85 inches long? (3 pts) Suppose that the weight (X) in pounds, of a 40-year-old man is a normal random variable with standard deviation σ = 20 pounds. If 5% of this population is heavier than 214 pounds what is the mean μ of this...
Terms 2 Questions 3 Scores on the Stanford-Rinst i test are assumed to be normally standard deviation of 15 10% of the population? testare assumed to be normally distributed with a mean of 100 and a wit percent of the portation score above 1257 Below what score lie the lowest l Question 4. A task consists of installing an electric harness under the dashboard of a General Motors car. Assume that the times for these tasks are normally distributed with...
Use the normal distribution of fish lengths for which the mean is 10 inches and the standard deviation is 2 inches. Assume the variable x is normally distributed. a)What percent of the fish are longer than 14 inches? b)If 400 fish are randomly selected about how many would you expect to be shorter than 9 inches?
Use the normal distribution of fish lengths for which the mean is 11 inches and the standard deviation is 2inches. Assume the variable x is normally distributed. A-What percent of the fish are longer than 14 inches? B -If 500 fish are randomly selected, about how many would you expect to be shorter than 9 inches?
Use the normal distribution of fish lengths for which the mean is 9 inches and the standard deviation is 4 inches. Assume the variable x is normally distributed. What percentage of the fish are longer than 13 inches?
Songs on iTunes have a mean length of 3.54 minutes with a standard deviation of 0.25 minute? If the distribution of song lengths follows a normal distribution, what percentage of songs are shorter than 4 minutes between 4.4 and 4.6 minutes?
The length of the western rattlesnake is normally distributed with a mean of 42 inches and a standard deviation of 2 inches. Let x denote length for western rattlesnakes. 3. a. Use MATHCAD to draw the distribution of the variable x, then use cut-and-paste to transfer the output of MATHCAD into this document Determine and show the formula for the standardized version, z, of the variable x. Identify and draw the distribution of z. The percentage of western rattlesnakes that...
The lengths, in inches, of adult corn snakes have an unknown distribution with a population mean of 61 inches and a population standard deviation of 8 inches. Samples of size n-64 were randomly drawn from the population. Using the Central Limit Theorem for Means, what is the mean for the sample mean distribution?
Lazurus Steel Corporation produces iron rods that are supposed to be inches long. The machine that makes these rods does not produce each rod exactly inches long. The lengths of the rods vary slightly. It is known that when the machine is working properly, the mean length of the rods made on this machine is inches. The standard deviation of the lengths of all rods produced on this machine is always equal to inch. The quality control department takes a...
A machine at Katz Steel Corporation makes 3-inch-long nails. The probability distribution of the lengths of these nails is approximately normal with a mean of 3 inches and a standard deviation of 0.12 inch. The quality control inspector takes a sample of 25 nails once a week and calculates the mean length of these nails. If the mean of this sample is either less than 2.95 inches or greater than 3.05 inches, the inspector concludes that the machine needs an...