et x denote the time it takes to run a road race. Supposex is approximately normally distributed with a mean of 190 minutes and a tandard deviation of 21 minutes. If one runner is selected at random, what is the probability that this runner will complete this oad race in less than 202 minutes?

Q: suppose that a coin is to be tossed four times and let X represent the number of tails that can come…

A: Given: A coin is tossed four times. X represents the number of tails. The objective is to find…

Q: What is the standard deviation of the time spent with a patient? What is the likelihood that the…

A: The standard deviation of the time spent with a patient can be calculated as:   Thus, the standard…

Q: is a normal random variable with mean 20 and stadard deviation 50. Find the probability that 15

A: Answer the population mean = 20The population standard deviation = 50Using formula:P [A<Z<B] =…

Q: Let x be a random variable that represents the weights in kilograms (kg) of healthy adult female…

A: Given, Then x has a distribution that is approximately normal with mean = 62.0 kg and standard…

Q: The sick leave time of employees in a firm in a month is normally with a mean of 100 hours and a…

A: Dgg

Q: Suppose that the monthly demand for a consumer good follows a normal distribution with an average of…

A: From the given information, Consider, X that the monthly demand for a consumer good follows a normal…

Q: Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.4…

A: Let X denote the the walking step lengths of adult males and it follows normal distribution with a…

Q: In a recently conducted survey, workers reported driving an average of 36 miles one way on their…

A: Given Population mean = 36miles Population standard deviation =5

Q: Suppose the height of a certain population is normally distributed with mean of 158 cm and variance…

A: Given,mean(μ)=158standard deviation(σ)=16=4

Q: The probability that a person who exercises and eats well has a heart attack is predicted to be 0.5…

A: We know that if; Y~Binomial(n,p)Then the expected value of Y is;E(Y)=npand the standard deviation of…

Q: Assume the probability that a maple tree at age 5 grows less than 130 cm is equal to 0.1. If the…

A:

Q: the life of a certain brand of car stereo is normally distributed with a mean of 5.2 years and a…

A: According to the given information in this question, we need to find the following probability

Q: The net weight of a can of salmon is a random variable with a mean of 6.21 ounces and a standard…

A: Solution

Q: The time it takes an acrylic paint to dry is normally distributed. If the mean is 2 hours 36 minutes…

A: Convert every information in minutes, so given that X , drying time, follows a normal distribution…

Q: The random variable X has a normal distribution with a variance of 16 and an unknown mean. If the…

A: Given Data: X is a random variable   Variance (X)=16   X~ Normal (μ, 16) P(x>65)=0.025

Q: Suppose x,the grade on a midterm exam,is normally distributed with mean 70 and standard deviation…

A:

Q: he level of nitrogen oxides (NOX) and nonmethane organic gas (NMOG) in the exhaust over the useful…

A: Given Data: Mean (μ)=85 Standard deviation (σ)=6 Variance (σ2)=36 Sample size(n)=16   Let X be the…

Q: suppose the walking step lengths of an adult males are normally distributed with a mean of 2.7 feet…

A: Given that  Mean=μ=2.7 Standard deviation=σ=0.3 Sample size=n=70 X~Normal(μ=2.7,σ=0.3)

Q: The green turtle migrates across the Southern Atlantic in the winter, swimming great distances. A…

A: X~N( μ , ?)   μ=2200 , ?=625   Z-score =( x - μ )/?

Q: Suppose the average age of a Tulane undergraduate is 20 years with a standard deviation of 1.2…

A:

Q: The average age of managers is 40 years. Assume the variable is normally distributed. If the…

A: Given data,μ=40σ=5P(35<X<46)=?

Q: Q6- Assume the probability that a maple tree at age 5 grows less than 140 cm is equal to 0.2. If the…

A: Given Data: Let X represent the height of the maple tree P(x<140)=0.2 σ=81=9

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 68 mph and…

A: X~N( μ , ?)μ=68     , ?=5Z-score =( x - μ )/?

Q: uppose that unknown to a geneticist, there are 6 out of 12 genes that play a significant role in…

A: Dear Student, As per the guidelines, i can asnwer only one question(or 3 subparts of it) . Kindly…

Q: A certain brand of car tends to break down on average after 115,000miles with a standard deviation…

A: The objective of this question is to find the probability that the average breakdown mileage of a…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 68 mph and…

A: X~N( μ , ?)μ=68   , ?=5Z-score =( x - μ )/?

Q: The level of nitrogen oxides (NOX) and nonmethane organic gas (NMOG) in the exhaust over the useful…

A: Introduction: The sampling distribution of the sample mean, X̄, based on a sample of size n, taken…