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The lengths of pregnancies in a small rural village are Normally distributed with a mean of 268 days and a standard deviation of 12 days. What percentage of pregnancies last beyond 290 days?
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The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 273 days and 275
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Males make a mean of 531 on math SAT with standard deviation of 114. Minimum 600 score. what's the % of males that don't satisfy this requirement? Pregnancies usually distributed mean of 268 days and standard distribution 15 days.
asked by Sue on December 5, 2006 
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1. When designing motorcycle helmets, the breadth of a person's head must be considered. Men have head breadths that are normally distributed with a mean of 6.0 inches and a standard deviation of 1.0 inches. If one male is
asked by maczindahouse on February 27, 2019 
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Actual lengths of pregnancy terms are nearly normally distributed about a mean pregnancy length (of about 3839 weeks) with a standard deviation of 15 days: about what percentage of births would be expected to occur within 15 days
asked by Daniel on February 12, 2013 
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how would i do about this problem can someone explain it to me or show me because i keep getting weird answers with an e at the end. It makes no sence. This question is: The length of human pregnancies from conception to birth
asked by jasmine20 on February 11, 2007 
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The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation
asked by bob on May 15, 2014 
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The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation
asked by bob on May 15, 2014 
statistics
The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation
asked by Jeff on August 17, 2014 
Statistics
An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are independently and normally distributed with a mean of 120 cm and a standard deviation of 4.7 cm. Find the
asked by Meghan on September 21, 2011