The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 307 or longer. 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 premature

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

A: (a)   Obtain the probability that pregnancy will last 307 days or longer. The probability that…

Q: The diameters of ball bearings are distributed normally. The mean diameter is 87 mm and the standard…

A:

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

A: Refer Standard normal table/Z-table to find the probability of z=2.80.

Q: Consider the prices have a Normal Distribution. Price mean = 75 Price S.D = 8 What is the…

A:

Q: . What is the probability that a person spends less than 37.0 minutes shopping for groceries?   b.…

A:

Q: In a normal distribution A. Values at the tail ends are less likely to occur than the mean. B. A…

A: We want to find the true statement about normal distribution,

Q: Private nonprofit four-year colleges charge, on average, $27,628 per year in tuition and fees. The…

A: Given Private nonprofit four-year colleges charge, on average, $27,628 per year in tuition and fees.…

Q: 44%  of students in a class have black hair. If 66 students are chosen at random, what is the…

A:

Q: Solve the problem. The probability that an individual is left-handed is 0.18. In a class of 90…

A:

Q: An appliance dealer's website features the mean life expectancy values for major household…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: IQ test scores are normally distributed with a mean of 98 and a standard deviation of 16. An​…

A:

Q: The weight of football players is normally distributed with a mean of 220 pounds and a standard…

A: Given X is normal Distributed with mean µ = 220.0 and standard deviation σ = 25.0 now will using…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: The population mean for the average weigh of 12 year old children is 102 pounds and the population…

A: Solution: Let X be the weight of 12 year old children. From the given information, µ=102 pounds,…

Q: The weights of steers in a herd are distributed normally. The standard deviation is 300⁢lbs and the…

A:

Q: Direction: Compute and Illustrate the distribution of the mean. 1. The average price of a computer…

A: Given,sample size(n)=27mean(μ)=789standard deviation(σ)=348

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

A:

Q: The mean of a normal probability distribution is 600; the standard deviation is 20. About 68% of…

A: given data normal distribution population mean  = 600 population sd = 20

Q: Trucks in a delivery fleet travel a mean of 130 miles per day with a standard deviation of 39 miles…

A: The data on per day mileage of a delivery truck is normally distributed. Population mean, Population…

Q: Assume that the weight of people, measured in pounds, has a normal distribution with a mean of 136…

A: Answer: Given that   ‘x’ is Normally distributed with                 Mean  µ =136       standard…

Q: The estimated annual probability that a woman over the age of 32 dies of lung cancer equals 0.001204…

A:

Q: The service time for customers coming through a checkout counter has mean 128 seconds and standard…

A: Let, X=The service time for customers coming through a check out counter Given that X follows a…

Q: The average amount of snow per year in Whiteville is 32 inches. The standard deviation is 4 inches.…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation…

A: We have to find given probability.

Q: Billiard tables have mean degree of balance 0 and standard deviation 1. What is the probability…

A: It is given that the degree of balance is normally distributed with mean 0 and standard deviation is…

Q: Find the indicated probability. The weekly incomes of a summer intern in Tesla are normally…

A: Given data,Mean μ=1500sd    σ=300P(X<1200)=?

Q: The sales of a salesman average $500 with a standard deviation of $15.2. He gets a $100 commission…

A: The sales of a salesman average $500 with a standard deviation of $15.2. He gets a $100 commission…

Q: The amount that people pay for their cellphone service is normally distributed with a mean of $136…

A:

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability.   IQ test…

A: Solution :- Given data :- μ = 105σ = 13x ^ = 122 Using Z-Score Formula :- z=x^-μσ

Q: a. Find the probability of a pregnancy lasting 308 days or longer. b. If the length of pregnancy is…

A: Given Data Population Mean,μ = 269 Population Standard Deviation,σ = 15

Q: The grades of business statistics are normally distributed with mean 80 and standard deviation 10.…

A: GivenMean(μ)=80standard deviation(σ)=10

Q: A sniper hits a target 80% of the time. He fires five shots at the target. Find  A. Probability…

A: Given problem is binomial distribution Let X: No. of hits n=No. of shots at the target=5 p=prob. of…

Q: Find the probability that an observation taken from a standard normal population will be more than…

A: We have to find given probability..

Q: Assume the average weight of a schoolchild's book bag is 17.5 pounds, with a standard variation of…

A: Let X be a random variable that denotes the weight of the child's school bag. Then, it is provided…

Q: The body temperatures of all mosquitoes in a county have a mean of 57∘F and a standard deviation of…

A:

Q: The length of time a person shops for groceries can be modeled by an exponential distribution with…

A:

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

A: Given,mean(μ)=267standard deviation(σ)=15

Q: Norman is a student at a college in Durban. The amount of time, in minutes, that Norman walks to the…

A: Given: Amount of time = X X is uniformly Distributed in [ 15 , 40]

Q: Five hundred youths participated in a national sport competition. Their heights averaged 110cm with…

A: Given that

Q: Suppose that the number of hours that an adult watches in a day has a mean of 2.4 hours and a…

A: Given: i. Calculate the corresponding Z score as follows: The diagram corresponding to the mean…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

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.