probability that the average commute time of 11 random days is less than 39.67 minutes?

Q: Suppose that the walking step lengths of males are normally distributed with a mean of 2.5 feet and…

A: We have to find given probability.

Q: A study was conducted to measure the weights of the tilapia harvested from a particular cage far…

A: The weight are normally distributed with mean 370.2 with standard deviation μ=370.2σ=32.7

Q: Scores for a common standardized college aptitudê test are standard deviation of 97. Randomly…

A: A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: Betermine if the finite correction factor should be used. If so, use it in your calculations when…

A: From the provided information, Mean (µ) = $2.874 Standard deviation (σ) = $0.009 X~N (2.874, 0.009)…

Q: in a certain region, the mean annual salary for electricians is $58,650. Let x be a random variable…

A: GivenMean(μ)=58650standard deviation(s)=1890sample size(n)=40

Q: Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long…

A: Obtain the probability that one car chosen at random will have less than 74.5 tons of coal. The…

Q: Q4: the statistics exam score of students has mean 74 and standard deviation 6.8. if a sample of 50…

A: Given,mean(μ)=74standard deviation(σ)=6.8sample size(n)=50

Q: Question1 A Mobile store in Amman is fixing mobiles the average number of the monthly repaired…

A: According to the answering guidelines, we can answer only three subparts of  a question and the rest…

Q: If 1 person is randomly selected from the general population, find the probability that they score…

A:

Q: Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.7…

A: Given Data Population Mean,μ = 2.7 Population Standard Deviation,σ = 0.3 sample…

Q: Assume that X, the starting salary offer for psychology majors, is normally distributed with a mean…

A: Given,mean(μ)=47,507standard deviation(σ)=5,000

Q: The probabilities that fast – food restaurant sells 10, 20, 30, 50, 100 burgers daily are 0.20,…

A:

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: Study shows that teenagers spend on average $ 55.5 per month on fast food. with a standard deviation…

A: Solution-: Given: \mu=55.5, \sigma=4.5 We find, (a) P(their monthly spending is between $56.5 and…

Q: If the sampled tilapia number 500, how many of these are expected to weigh between 330 and 394…

A: Given that mu =370.2 , s.d = 32.7

Q: The mean annual cost for car insurance is normally distributed. For a used car, the mean annual cost…

A: Solution

Q: There are 20 crew members at a given university. You want to calculate the probability that their…

A: The question is about sampling distribution.Given :Selected no. of crew members ( n ) = 20Population…

Q: If 70 shafts are sampled at random from the batch, what is the probability that the mean diameter of…

A: Let X be the random variable of the diameter of metal shafts produced in a manufacturing…

Q: The probability that you will win a game is π = 0.58. If you play the game 653 times, what is the…

A: Given data,π=0.58Total no of games n=653Let X be the no of games wonX~Bin(n,π)

Q: Suppose you do a poll to one hundred people. 52% of the people say that will vote for candidate A…

A: According to central limit theorem, the sampling distribution of sample proportion can be…

Q: Suppose the weight of dogs is normally distributed with a mean of 35 pounds and a standard deviation…

A: Given,   Mean = 35 Standard deviation = 5   The objective is to find the probability a dog weighs…

Q: d. 99% of the people in Country A consumed less than how many gallons of soft drinks? gallons of…

A: Given that Mean=M=18.26, Standard deviations=Sd=4

Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…

A: Given data μ=200σ=9normal distribution P(x<197)=?

Q: In one region, the September energy consumption levels for single-family homes are found to be…

A: given  data normal distributionμ = 1050σ = 218n = 50p ( x¯ > 1075) = ?

Q: d. What percentage of terminals will last between 2.5 and 4.5 years? e. If the manufacturer…

A: Mean(µ) = 4 yearsStandard deviations (σ) = 10/12 = 0.83 yearX ~ N (µ, σ )= N(4, 0.83)

Q: Find the probability that an individual man’s step length is less than 2.3 feet.

A: Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.6…

Q: The cafeteria records that 67% of students buy pizza with a standard deviation of .03 If you took a…

A: Given: p=67% and σ=0.03. Now, if a sample of 100 is taken, then standard deviation of sample will…

Q: 7. The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a…

A: Given,sample size (n)=51mean(μ)=56.8standard deviation(σ)=12.3

Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…

A: given that:- Mean, μ = 200 Standard deviation, σ = 9

Q: Assume that for the population of all unemployed individuals in Minnesota, the population mean…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 104 and a standard…

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

Q: Suppose you sample 2 students from every classroom where a class is being held at Duke University at…

A: Solution The distribution of the population is not given and sample size is not large to apply the…

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 321…

A: We have given that, The weights of cows have a normal distribution with mean (Mu) = 321 and standard…

Q: X is a normally distributed random variable with mean 61 and standard deviation 23. What is the…

A:

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

A: normal distributionμ = 105σ = 20P(93<x<117) = ?

Q: standard

A: Given: Mean, μ=80 Standard deviation, σ=7 Sample size, n=49 To find: P (X>82) Using normal…

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

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 ,…

Q: What is the probability that the jewelry store will have to pay off on its promise?

A: