The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation of 15 days.a. In a letter to an advice column, a wife claimed to have given birth 308 days after a brief visit from her husband, whowas working in another country. Find the probability of a pregnancy lasting 308 days or longer. What does the resultsuggest?b. If the length of pregnancy is in the lowest 4%, then the baby is premature. Find the length that separates prematurebabies from those who are not considered premature.a. The probability that a pregnancy will last 308 days or longer is(Round to four decimal places as needed.)

Answered: The lengths of pregnancies are normally…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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50 part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Frequency 1 13 2 22 3 4 5 a. Complete the table above b. Find the sample mean and sample standard deviation. c. How many standard deviations above or below the mean is taking three classes? d. Find the probability that someone takes at least 3 classes.
The lengths of pregnancies are normally distributed with a mean of 270 days and a standard deviation of 15 days. a. In a letter to an advice column, a wife claimed to have given birth 309 days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting 309 days or longer. What does the result suggest? b. If the length of pregnancy is in the lowest 3%, then the baby is premature. Find the length that separates premature babies from those who are not considered premature. a. The probability that a pregnancy will last 309 days or longer is (Round to four decimal places as needed.) What does the result suggest? OA. The result suggests the event did not occur. OB. The result suggests that the husband is the father. C. The result suggests an uncommon but not significant event occurred. OD. The result suggests that either a very rare event occurred or the husband is not the father. b. Babies who are born on or before ☐ days are…
Leave all probabilities as percentages. Define x on all problems with data. The number of patients coming into a dental clinic each day were 74, 52, and 83. a. Find the sample mean. b. Find the sample standard deviation. c. Find the population variance.
The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation of 15 days. a. In a letter to an advice column, a wife claimed to have given birth 308 days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting 308 days or longer. What does the result suggest? b. If the length of pregnancy is in the lowest 2%, then the baby is premature. Find the length that separates premature babies from those who are not considered premature. a. The probability that a pregnancy will last 308 days or longer is ☐ (Round to four decimal places as needed.)
You play a game of chance that you can either win or lose (there are no other possibilities) until you lose. Your probability of losing is p = 0.61. What is the probability that ita. takes 2 games until you lose. b. takes 5 games until you lose. c. Find the mean c. Find the standard deviation.
One in ten adults in a city visited a doctor last month. If a sample of 6 adults is selected randomly, i. Find the probability that exactly 4 adults visited the doctor? ii. Find the probability that at least 2 adults visited the doctor? iii. Find the mean and the standard deviation for the number of adults not visited the doctor.
The Greenville Power Authority states that the mean monthly energy bill for their customers is $228 with a standard deviation of $38. They know that energy bills follow a normal distribution. a. Between what two values do we expect 99.7% of energy bill’s to fall? b. What is the probability of a randomly selected energy bill at least $190?
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Find the mean and standard deviation of the number of red-headed Scots in a randomly selected group of 155. The probability of having red hair is still 13% for Scottish people. a. Mean = b. Standard deviation (Round to 2 places)=
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The average number of kilos of meat a person consumes in a year is 90 kilos. Assume that the standard deviation is 10 kilos and the distribution is approximately normal. If a sample of 45 individuals is selected, find the probability that the mean of the sample will be 87 kilos or greater per year. Express your answer in percent form with 2 decimal places (with percent symbol - e.g. 10.00%) type your answer...

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