The time required for a citizen to complete the 2000 U.S Census "long" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. What proportion of citizens will require less than one hour?

Q: Suppose that shoe sizes of American women have a bell shaped distribution with a mean of 8.04 and a…

A: Given that  Mean = 8.04 , Standard deviation = 1.53

Q: Hospital waiting room times are normally distributed with a mean of 38.12 minutes and a standard…

A: From the provided information, Mean (µ) = 38.12 minutes Standard deviation (σ) = 8.63 minutes X~N…

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A: Mean = 1516 Standard deviation = 309

Q: According to a recent study the Weight of male babies less than two months old in United States is…

A: Given that, Mean, mu= 11.4 Standard deviation, sigma= 2.7 We know that,  Z score= (X- my)/sigma

Q: The time it takes for a grade 11 students to complete a physical test is normally distributed with a…

A: X=the time for Grade 11 students to complete a physical fitness test  Given that X follows a normal…

Q: The number of Facebook friends students at a university have are approximately Normally distributed…

A: GivenMean(μ)=1200standard deviation(σ)=200

Q: The incubation time for Rhode Island Red chicks has a Normal distribution with a mean of 21 days and…

A: Here, mean is 21 and standard deviation is 1

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

Q: The time required for a person to complete the 2020 U.S. Census “long” form is normally distributed…

A: Let X be the census long form  X~N(μ=40, σ=10) P(X≥a) =10%  We want to find the value of a

Q: To qualify for a police academy, applicants are given a test of physical fitness. The scores are…

A: Obtain the cut off score for the top 20% of the applicants are selected. The cut off score for the…

Q: Hours of sleep per night for an adult are normally distributed with a mean of 7.2 hours and a…

A: From the provided information, Mean (µ) = 7.2 hours Standard deviation (σ) = 1.9 X ~N (7.2, 1.9)…

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: We have given that.    X~N( μ , ?^2 )    μ = 5.1      , ? = 1.8   Z-score =( x - μ )/?

Q: Suppose the heights of men are normally distributed with mean, μμ = 69.5 inches, and standard…

A:

Q: The SAT scores of all freshmen accepted at State University are normally distributed, with a mean of…

A: Let X be the random variable of SAT scores of all freshman. Given Data: E(X)=1050 SD(X)=120 X~…

Q: The retirement age of National Football League (NFL) players is Normally distributed with a mean of…

A: GivenMean(μ)=33standard deviation(σ)=2

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A:

Q: Because of relatively high interest rates, most consumers attempt to pay off their credit card bills…

A: The proportion of the bank’s Visa cardholders pay more than $30 in interest is, Thus, the…

Q: Suppose the average golfer drives the ball around 259.1 yards with a standard deviation of 9.73.…

A: Solution

Q: A person must score in the upper 2% of the population on an IQ test to qualify for membership in…

A:

Q: .A person must score in the upper 2% of the population on an IQ test to qualify for membership in…

A: As per the guidelines we are allowed to solve maximum of 1 question. If you need help with other…

Q: A company sells printers with a mean life of 2 years (24 months) and a standard deviation of 4…

A: GIVEN: mean = 24 months           standard deviation = 4 months

Q: Assume that IQ scores are normally distributed, with a standard deviation of 17 points and a mean of…

A: From  the information, the sample size is 110, mean is 100 and standard deviation is 17.

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: Suppose that IQ scores have a bell-shaped distribution with a mean of 100100 and a standard…

A: Empirical rule: About 68% of data lies within the first standard deviation of the mean. About 95%…

Q: The time required for a citizen to complete the 2000 U.S. Census '' long'' form is normally…

A:

Q: Tommy Wait, a minor league baseball pitcher, is notorious for taking an excessive amount of time…

A: Let X denote the times between pitches. Given that X follows N(mean = 33, SD = 2.5), then Z = (X -…

Q: Suppose the heights of men are normally distributed with mean, μμ = 69.5 inches, and standard…

A: Solution

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: From the given information, μ=54.7σ=2.4

Q: The time spent (in days) waiting for a heart transplant in Ohio and Michigan for patients with a+…

A: The minimum time spent waiting for a heart that would place a patient in the top 30 % waiting time…

Q: The time required for nurses to learn a particular task are found to be normally distributed with a…

A: Given information- Population mean, μ = 18.4 minutes Population standard deviation, σ = 2.7 minutes…

Q: Assuming that the heights of college women are normally distributed with mean 65 inches and standard…

A: Solution: Let X be the heights of college women are normally distributed with mean μ= 65 inches and…

Q: The number of shots on goal in an amateur hockey league's games is normally distributed, a mean of…

A: Let X=the number of shots X follows a normal distribution with mean= 56.3 and standard deviation=…

Q: What is the greatest amount of time that a newborn can sleep and still be in the bottom 75% of…

A: Let , X→N(μ=15.5 , σ=1.6) Our aim is to find the greatest amount of time that a newborn can sleep…

Q: Tommy Wait, a minor league baseball pitcher, is notorious for taking an excessive amount of time…

A: The mean and standard deviation are 190 and 2.3, respectively.

Q: The heights of English men are normally distributed with a mean of 69.2 inches and a standard…

A: given mean  (μ= 69.2 )   standard deviation(σ)  = 4      z= (x-μ)/σ p(x<57.2) =P((x-μ)/σ  <…

Q: The time it needs a communications worker to arrange a domestic phone call is normally distributed…

A: It is given that the mean is 50 seconds and standard deviation is 8 seconds.

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A:

Q: The admission committee of AUCA enrolls 60% of those who took the exam. If the scores follow a…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Here, mean is 250 and standard deviation is 50 Part (a):If x¯ = average distance in feet for 49 fly…

Q: In order to be accepted into a certain top university, applicants must score within the top 5% on…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A Japanese shoe company investigates the foot lengths of young men to help predict the number of…

A:

Q: The time spent waiting for a kidney transplant is distributed normally with a mean of 1674 days and…

A: Solution: Let X be the time spent for a kidney transplant. From the given information, X follows…

Q: The combined math and verbal scores for females taking the SAT-I test are normally distributed with…

A: Given that  mean of 998 and a standard deviation of 202 P(x<875 )=?

Q: The lengths of human pregnancies are approximately normally distributed, with mean days and standard…

A:

Q: The admission committee of AUCA enrolls 76% of those who took the exam. If the scores follow a…

A:

Q: In order to qualify for police academy training, recruits are given a test of stress tolerance. The…

A: From a given information, Mean = 250 Standard deviation = 18

Q: The heights of 10 year old American children are normally distributed with a mean height of 4 feet…

A: From the provided information, Mean (µ) = 53 inches Standard deviation (σ) = 4.5 inches Let X be a…

Q: Suppose the heights of men are normally distributed with mean, μ = 69 inches, and standard deviation…

A: From the provided information, Mean (µ) = 69 inches Standard deviation (σ) = 3 inches Let X be a…

Q: What percentage of teenagers sleep less than 9 hours?

A:

Q: A Japanese shoe company investigates the foot lengths of young men to help predict the number of…

A: We know one of the three statement of empirical rule as: P  μ-2σ≤X≤μ+2σ = 0.95 i.e. P -2≤X-μσ≤2 =…

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.