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Question: Length of pregnancies. The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days. Use the 68-95-99.7 rule to answer the following questions.
(a) Almost all (99.7%) pregnancies fall in what range of lengths?
(b) How long are the longest 2.5% of all pregnancies?
Depict the situation as a model with incomplete information, where the state of nature is the amounts in Mark and Luke's envelopes.
in 1998 the world health organization reported the findings of a major study on the quality of blood pressure
A manufacturer claims that the mean lifetime, mean, of its light bulbs is 52 months. The standard deviation of these lifetimes is 7 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 55 months.
the lifetime in hours of a certain kind of radio tube is a random variable with the probability density function given
The cable segments support the loading shown. Determine the horizontal distance from the force at B to point A. Set P = 40 lb
The number of UFO (Unidentified Flying Object) sightings per week in Roswell, NM is a random variable with the cumulative distribution function given below.
Describe before the Charter of Rights and Freedoms, how there was very little could be done about unjust laws passed by the government, specifically ones that violated civil and minority rights?
question a population has a standard deviation of 50. a random sample of 100 items from this population is selected.
Bill scored 1200 on the Scholastic Aptitude Test and entered college as a physics major.- For this situation, identify at least one piece of information in the nominal scale of measurement.
Which of the following is NOT true regarding the normal probability distribution.
A ?uidized bed reactor through which chlorine gas ?ows has a temperature probe that fails periodically due to corrosion. The length of time (in days) during which the temperature probe functions is known to be a Weibull distributed random variable..
the slider p moves inward by pulling a string is not shown. the arm angular position is given in radians by theta
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