The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 270 days and a standard deviation of 9 days. (a) What is the minimum pregnancy length that can be in the top 10% of pregnancy lengths? (b) What is the maximum pregnancy length that can be in the bottom 4% of pregnancy lengths? days. (a) The minimum pregnancy length is (Round to one decimal place as needed.)

Q: Heights for group of people are normally distributed with mean = 66 inches and standard deviation =…

A: Given that mu = 66 , s.d =3.9

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A: Given information: μ=100σ=15 Standard deviation rule: 68% of the data lies between μ-σ,μ+σ95% of the…

Q: An IQ score has a mean, u = 90, and standard deviation, o = 10. (5PTS EACH) 1. A genius is sometimes…

A: 5. Mean = 100, Stdev = 10 a. PX≥140 = PZ≥ 140-100 10 = P(Z≥ 4) = 0.000031

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A: Given Information:  92        97        98        98        99        100      101      103      114…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ…

A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

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A: Let us understand better by assuming X1, X2, ...., Xn be n data points. Then,…

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A:

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. a) Draw a…

A: The provided information is  µ=100 σ=15 a. The detailed sketch is

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A: If the distribution is divided into two parts and the two sides are a mirror image of each other,…

Q: The arithmetic mean salary of XYZ corporation employees is 45,601, and the standard deviation is…

A: Answer: From the given data, Mean μ = 45601 Standard deviation σ =5294

Q: Heights for group of people are normally distributed with mean = 69 inches and standard deviation =…

A:

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A: Obtain the z-score for the random variable X equals 85. The z-score for the random variable X equals…

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

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A: Given: n = 6 Formula Used: Standard error Se = S∑Xi-X2 Where, S = Sy2-b2Sx2n-1n-2 b =…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267.3…

A: The given question requires accurate results, Hence I will use Excel to solve this question.…

Q: answers to four decimal places.) (a) Between 63 inches and 67 inches. P =  (b) Between 61 inches…

A: As per bartleby guidelines we can solve only first three subparts and rest can be reposted

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A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

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A:

Q: Heights for group of people are normally distributed with mean = 66 inches and standard deviation =…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. a. What…

A: Given DataMean = 100Standard Deviation = 15

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A: Given Mean =70 Standard deviations=10 Z=-1.5

Q: Consider again the birth weights of newborn babies, where the mean weight is 3290 grams and the…

A: From the provided information,Mean (µ) = 3290Standard deviation (σ) = 520X~N (3290, 520)

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days…

A:

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

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A:

Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

A: The random variable score follows normal distribution. The population mean is 55.         The…