Average daily demand (normally distributed) = 150 Standard deviation = 0 = 16 Average lead time 5 days (normally distributed) Standard deviation = OLT= 1 day 95% service level desired Z for 95% = 1.65
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- the life span of computer manufactured by xyz company is normally distributed with mean 8 years and standard deviation 1.5 years. what percentage of xyz monitors will remain operational after 9 years?The lifetime of a certain type of automobile tire (in thousands of miles) is normally distributed with mean μ = 40 and standard deviation σ = 5 What proportion of tires have lifetimes between 38 and 43 thousand miles?Mechanical pencil lead is manufactured with a mean width of 0.9 mm. because of variability in the manufacturing process, of distribution of the width for the pencil lead is approximately normal with a standard deviation of .004mm. if any pencil lead thinner than .8938mm is discarded what proportion of the pencil lead is not discard
- Adult males have normal distributed heights with mean equal to 70 inches and standard deviation equal to 3 inches. What percent are taller than 72 inches.Lengths of pregnancies of humans are normally distributed with a mean of 265 days and a standard deviation of 10 days. Use the Empirical Rule to determine the percentage of women whose pregnancies are between 255 and 275 days.Resting pulse rates for healthy adults are found to have approximately a Normal distribution with a mean of 6969 beats per minute and a standard deviation of 8.58.5 beats per minute.What percentage of healthy adults have resting pulse rates that are below 50 beats per minute?
- Pulse rates of women are normally distributed with a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per minute. What are the units of the corresponding z scores?Age at onset of dementia was determined in the general population to be 70 and standard deviation 5.0. Based on the data above, what is the z score for the age of 74?High density lipoprotein in healty males follow a normal distribution with a mean of 50 and a standard deviation of 8. What proportioon of healthy males has HDL exceeding 60?
- A firm manufactures light bulb whose length of life follows a normal distribution with mean 90 hours and standard deviation of 2 hours. B.) What is the first decile life of the electric bulbs manufactured by this firm?The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.1 days and a standard deviation of 1.8 days.What is the median recovery time? ______ daysThe blood pressure (average of systolic and diastolic measurements) of each of 25 randomly selected persons was measured. The average was 97.5 mm Hg, and the standard deviation was 8.05 mm Hg. What is the critical t value? What is the margin of error?