The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days and a standard deviation of 14 days.  What percentage of pregnancies last fewer than 271.8 days?

Q: The gestation period for human births can be taken as normally distributed with a mean of 256 days…

A:

Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Solution: Let X be the time a patient of a medical center spends waiting for an appointment. From…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: College students average 7.8 hours of sleep per night with a standard deviation of 40 minutes. If…

A:

Q: Elephants have the longest pregnancy of all mammals. suppose that for Asian elephants, the lenghts…

A: The objective of this question is to find the percentage of Asian elephant pregnancies that are…

Q: An IQ exam has a mean of 110 and a standard deviation of 12. What percent of people have an IQ score…

A: Given mean= 110 Standard deviation=12 We know that Z=X-mean/standard deviation

Q: College students average 7.4 hours of sleep per night with a standard deviation of 45 minutes. If…

A: Given data  college students average 7.4 hrs of sleep with standard deviation of 45mins

Q: The mean annual income for people in a certain city (in thousands of dollars) is 42, with a standard…

A: The formula for mean of the Z-score is, Z=x¯-μσn Here n is the sample size, μ is the population mean…

Q: The time taken to boil a kettle is normally  distributed with a mean of 94 seconds and  a standard…

A: The provided information is  µ=94 σ=6 P(-a<X<a)=0.40…

Q: he distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Given data,μ=35σ=12P(11<X<35)=?

Q: A normal population has a mean= 61 and standard deviation=16. what proportion of the population is…

A: From the provided information, Mean (µ) = 61 Standard deviation (σ) = 16 X~N (61, 16)

Q: The gestation period for human births can be taken as normally distributed with a mean of 256 days…

A: Given: The gestation period for human births can be taken as normally distributed with a mean of 256…

Q: The average score of all golfers for a particular course has a mean of 76 and a standard deviation…

A: We have given information with the usual notation, Let X denote the score of golfers for a…

Q: Assume that women have heights that are normally distributed with a mean of 63.6 inches and a…

A:

Q: uppose the distribution of heights of a group of 200 children is normal with a mean of 150…

A:

Q: Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve speeds can…

A: M=Mean=112, sd=standard deviations=5

Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Given data, μ=35σ=12P(X>60)=?

Q: The duration of human pregnancies are normally distributed with a mean of 267 days and a standard…

A: X follows a Normal distribution with mean = 267 and S.D = 16 Then z=(x-mean)/SD = (x-267)/16…

Q: For woman at Hartford college, times to run 400 meters are normally distributed with a mean of 85…

A: Solution: Let X be the time to run 400 meters. From the given information, X follows normal…

Q: The lengths of a particular animal's pregnancies are approximately normally distributed with mean of…

A:

Q: The average score of all golfers for a particular course has a mean of 64 and a standard deviation…

A:

Q: The stature of men is normally distributed, with a mean of 69.0 inches and a standard deviation of…

A: From the given information, the mean of women is 63.6 inches and standard deviation is 2.5 inches.…

Q: What proportion of people has diastolic blood pressure less than 80?

A:

Q: The time needed to take an exam is normally distributed with an average of 120 minutes and a…

A: Given,mean(μ)=120standard devition(σ)=20

Q: The length of pregnancies are normally distributed with mean of 268 days and a standard deviation of…

A: Given : Length of pregnancies = X  X is normally distributed  Mean of X = 268 days  Standard…

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: LED lamp has a mean usage of 750 hours with standard deviation of 50 hours. If LED lamp usage is…

A: Provided information is,  A LED lamp has a mean usage of 750 hours with standard deviation of 50…

Q: 21 year old men rates at rest are normally distributed with a mean of 70 beats per minute, and a…

A: Given that   21 year old men rates at rest are normally distributed Mean (μ)=70 beats per minute…

Q: Can the standard deviation of a data set be zero

A: Standard deviation can not be negative.

Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…

A: Given information- Population mean, µ = 67 inches Population standard deviation, σ = 3 inches We…

Q: hs of a particular animal's pregnancies are approximately normally distributed, with mean = 251 days…

A: Consider X be the random variable representing the time span of pregnancies.   X follows normal…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.