OI gnancy is HOT distributed with mean 208 days and a standard deviation of 15 days. Find the probability that a pregnancy lasts longer than 250 days. (a) 0.2264 (b) 0.1151 (c) 0.8849 (d) 0.6829 (e) None of the above
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X~N(
P(X>250)=?
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- I am trying to find the probability of a movie. production cost between 61 and 66 million dollars. Whats given is mean=63, standard deviation=20 So, P(61<x<66) P(61-63/20 < z < 66-63/20) P(-0.1 < z < 0.15) What are my next steps?IQ scores in a certain population are normally distributed with a mean of 99 and a standard deviation of 17. (Give your answers correct to four decimal places.) (a) Find the probability that a randomly selected person will have an IQ score between 93 and 108.(b) Find the probability that a randomly selected person will have an IQ score above 95.Systolic blood pressure for a group of women is normally distributed, with a mean of 123 and a standard deviation of 9. Find the probability that a woman selected at random has the following blood pressures. (Round your answers to four decimal places.) (a) greater than 138(b) less than 116(c) between 116 and 130
- NoneThe life of light bulbs is distributed normally. The standard deviation of the lifetime is 26 hours and the mean lifetime of a bulb is 570. Find the probability of a bulb lasting for at least 603 hours (Round your answer to four decimal places) CS Scanned with CamScannerA bus comes by every 13 minutes. The times from when a person arives at the busstop until the bus arrives follows a Uniform distribution from 0 to 13 minutes. A person arrives at the bus stop at a randomly selected time. Round to 4 decimal places where possible. The mean of this distribution is The standard deviation is The probability that the person will wait more than 6 minutes is Suppose that the person has already been waiting for 0.3 minutes. Find the probability that the person's total waiting time will be between 1.1 and 2.3 minutes 42% of all customers wait at least how long for the train? minut
- The age of children in kindergarten on the first day of school is uniformly distributed between 4.92 and 5.7 years old. A first time kindergarten child is selected at random. Round answers to 4 decimal places if possible. The mean of this distribution is The standard deviation isA binomial distribution has p = 0.35 and n = 100. If we are trying to approximate its probability using a normal approximation (applying the Central Limit Theorem) what is the standard deviation that we will use for this approximation? (a) 0.4770 (b) 0.2275 (c) 0.0477 (d) 4.7697 (e) None of the aboveSuppose the mean cholesterol levels of women age 45-59 is 5.2 mmol/l and the standard deviation is 0.7 mmol/l. Assume that cholesterol levels are normally distributed. Find the probability that a woman age 45-59 has a cholesterol level above 6.1 mmol/l (considered a high level). Round to four decimal places.P(x > 6.1) = Suppose doctors decide to test the woman’s cholesterol level again and average the two values. Find the probability that this woman’s mean cholesterol level for the two tests is above 6.1 mmol/l. Round to four decimal places.P(x̄ > 6.1) = Suppose doctors being very conservative decide to test the woman’s cholesterol level a third time and average the three values. Find the probability that this woman’s mean cholesterol level for the three tests is above 6.1 mmol/l. Round to four decimal places.P(x̄ > 6.1) =
