Twenty replicates of a single bottle of quality control material were analyze for hemoglobin. The mean hemoglobin value was found to be 15.0 mg/dL. the standard deviation was calculated to be 2.2 mg/dL. What would be the 1, 2, and 3SD ranges be for the quality control?
Twenty replicates of a single bottle of quality control material were analyze for hemoglobin. The mean...
2. A quality control engineer works at a factory that bottles engine oil. The amount of oil is normally distributed with mean 40 litres and standard deviation of 0.05 litres. If the amount is less than 39.9 litres or more than 40.1 litres it is deemed to fail the quality control process. (a) Find the probability that a bottle will fail quality control. (b) If the factory want to improve so that a bottle will fail 2% of the time,...
You have measured the blood hemoglobin concentrations in a random sample of 12 males aged 20-29 years and have obtained the following values in mg/dL: [ 14.7, 15.22, 15.28, 16.58, 15.1, 15.66, 15.91, 14.41, 14.73, 15.09, 15.62, 14.92] Calculate the following from the above sample: 1.95% confidence interval for the mean hemoglobin concentration in the population of 20-29 year old males. 2. 99% confidence interval for the mean hemoglobin concentration in the same population 3. 95% confidence interval for the...
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 120 months, with a standard deviation of 10 months. If he is correct, what is the probability that the mean of a sample of 90 computers would be less than 117.13 months? Round your answer to four decimal places.
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 83 months, with a standard deviation of 99 months. If he is correct, what is the probability that the mean of a sample of 78 computers would be less than 82.06 months? Round your answer to four decimal places.
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 117 months with a standard deviation of eight months if he is correct what is the probability that the mean of a sample of 52 computers would be less than 115. 46 months round your answer to four decimal places
A large cooperation has quality control over its fertilizers. The fertilizes are composed of nitrogen. The fertilizer requires 3 mg of nitrogen. The distribution of the percentage of nitrogen is unknown with a mean of 2.5 mg and a standard deviation of 0.1. A specialist randomly checked 100 fertilizer samples. What is the probability that the mean of the sample of 100 fertilizers less than 2 mg?
A large cooperation has quality control over its fertilizers. The fertilizes are composed of nitrogen. The fertilizer requires 3 mg of nitrogen. The distribution of the percentage of nitrogen is unknown with a mean of 2.5 mg and a standard deviation of 0.1. A specialist randomly checked 100 fertilizer samples. What is the probability that the mean of the sample of 100 fertilizers less than 2 mg?
QUESTION 18 A large cooperation has quality control over its fertilizers. The fertilizes are composed of nitrogen. The fertilizer requires 3 mg of nitrogen. The distribution of the percentage of nitrogen is unknown with a mean of 2.5 mg and a standard deviation of 0.1. A specialist randomly checked 100 fertilizer samples. What is the probability that the mean of the sample of 100 fertilizers less than 2 mg?
1. Twenty random samples, each containing 6 items, were taken in a control chart application and it was found that the grand average is = 5.240 cm and = 0.25. a. What would be the upper and lower control limits for the and R charts. b. The following measurements are taken last week: 5.2, 4.5, 5.5, 3.4, 5.3, and 5.5. Is the process still in control?
The manufacturer of Twitchy Energy Drink is doing a quality control to make sure that the caffeine content (in milligrams, mg) of the drink is meeting specifications. Because of slight natural variation in the bottlin variable with a mean of 74 mg and a standard deviation of 0.3 mg. The inspector takes a sample of 5 bottles from the production line g process, the amount of caffeine in each bottle is actually a random and finds that the average caffeine...