The average time taken to repair a computer is 13.8 minutes. If the standard deviation is known σ = 2.2

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.8 and a standard…

A: Let "X" be the IQ score of the adults.

Q: The average number of electronic messages received in a day on a smartphone is 15. If the standard…

A: Given information: μ=15σ=4

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A:

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0°C and a…

A: We have given that,  X be the random variable from standard normal distribution with mean (μ) = 0°C…

Q: Assume that readings on thermometers are normally distributed with a mean of 0 and a standard…

A:

Q: A population has a mean of 80 and a standard deviation of 7. A sample of 49 observations will be…

A: Given Information: Mean μ=80 Standard deviation σ=7 Sample size n=49

Q: The life of a vacuum cleaner is normally distributed with mean of 2 years and a standard deviation…

A: Given: Mean(μ)  = 2 years Standard deviation (σ) = 1 years

Q: The average number of miles driven on a full tank of gas in a certain model car before its​ low-fuel…

A: It is given that the mean is 399 and the standard deviation is 36.

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard…

A: Z = x-μσ~N(0,1)

Q: Assume that 11.7% of adults consider being a professional athlete their dream job. Find the…

A: It is given that p = 0.117 and n =2,760.

Q: Assume that the readings on thermometers are normally distributed with a mean of 0 degrees Celsius…

A: We have given that Mu= 0 , sigma =1 X~ N ( 0, 1) Zscore=(x-mu)/sigma

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

A:

Q: 5. The average American adult eats an average of 6.5 gallons of ice cream per year. Assume the…

A: (5) X follows a Normal distribution with mean = 6.5 and S.D = 2.3 Then z=(x-mean)/SD =…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: The test scores are -1.64 and 1.64.

Q: Assume that blood pressure readings are normally distributed with a mean of 123 and a standard…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.7 and a standard…

A: It is given that the IQ score follows normal distribution with mean 104.7 and standard deviation…

Q: The life of light bulbs is distributed normally. the standard deviation of the lifetime is 28 hours…

A: Answer: From the given data, mean(μ) = 570 Standard deviation(σ) = 28 X = 606 X~Normal…

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours…

A: Denote X as the life of a randomly selected light bulb.

Q: The probability that a randomly chosen student in a statistics class submits his/her homework on…

A: From the provided information, The probability that a randomly chosen student in a statistics class…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a…

A:

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Standard Normal Distribution: A random variable z is said to be a standard normal variable if z…

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 37 hours…

A: Answer: From the given data, mean (μ) = 515 Standard deviation(σ) = 37 X~ Norma distribution(μ,σ)

Q: 18 men will be tested for the discus throw. if Mu= 112ft and standard deviation= 13ft. find the…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 33 hours…

A: Answer: From the given data, Mean (μ) = 510 Standard deviation (σ) = 33 X~ Normal distribution (μ,σ)

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.1 and a standard…

A: Answer:- Given, IQ scores(X) are normally distributed with mean, μ = 98.1 and standard deviation, σ…

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: Paul drives to work each moming and the trip takes an average of u- 38 minutes. The distribution of…

A: X follows a Normal distribution with mean = 38 and S.D = 5 Then z=(x-mean)/SD = (x-38)/5  follows…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given: μ=0σ=1 The probability of obtaining a reading between -1.24°C and 0°C is obtained as below:…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard…

Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample 9 from the…

A:

Q: Find the probability that a randomly selected adult has an IQ greater than 136.4

A: Let X denote the IQ scores of adults. Given that X follows N(mean = 101.3, SD = 20.2), then  Z = (X…

Q: Let X = number of miles a family travels for summer vacation. X follows a normal distribution with a…

A:

Q: Find the probability that the reading is less than -2.08

A: We have given that readings on thermometers are normally distributed with a mean 0 and standard…

Q: A population of values has a mean of 233.8 and standard deviation of 44.4.  Find the probability…

A: Suppose the variable of interest is x.It is given that; x has mean of  and the standard deviation…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A:

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0°C and a…

A: It is given that the,  that the readings on the thermometers are normally distributed with a mean of…

Q: The probability that a randomly chosen student in a statistics class submits his/her homework on…

A: Given: The probability that a randomly chosen student in a statistics class submits his/her homework…