A random sample of 36 junior managers in the offices of corporations in a large city center was taken in order to estimate average daily commuting times for all such managers. Suppose that the population times have a normal distribution with mean 90 minutes and standard deviation 24 minutes. What is the probability that the sample mean is outside the range "85 to 100 minutes"? 0.88 0.12 0.45 0.68 0.32

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Q: 13. Assuming weights of female athletes are normally distributed with a mean of 140 Ibs and a…

A: Given: μ=140, σ=15 The corresponding z-value needed to be computed is:

Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 65 inches…

A: Let X=the heights of 18-year-old menGiven that X follows a normal distribution with mean=65 and…

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A: Solution

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Q: Suppose the average speeds of passenger trains traveling from Newark, New Jersey, to Philadelphia,…

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Q: he length of human pregnancies is approximately normally distributed with mean µ = 266 days and…

A: Given,       μ=266       σ=16 a   PX<260=Px-μσ<260-26616…

Q: The weights of packages of ground beef are normally distributed with mean 1 pound and standard…

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Q: Household incomes in the city of Tampa Bay  are right-skewed with an average of 50,270 and standard…

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Q: Among all monthly bills from a certain credit card company, the mean amount billed was $485 and the…

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Q: zookeeper took a random sample of 30 days and observed how much food an elephant ate on each of…

A: Given : 90% CI for the mean amount of food was [341kg, 359kg].

Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 65 inches…

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Q: A random sample of 16 junior managers in the offices of corporations in a large city center was…

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Q: Recall that the foot length of a randomly chosen adult male is a normal random variable with mean…

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Q: The average fuel efficiency of U.S. light vehicles (cars, SUVs, minivans, vans, and light trucks)…

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Q: The heights of North American women are normally distributed with a mean of 64 inches and a standard…

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Q: The shape of the distribution of the time required to get an oil change at a 15 minute oil change…

A: Here we have μ = 16.2 min and Std (s) = 3.7min

Q: A factory manufactured PVC pipes with a mean diameter of 3.4 cm, a standard deviation of 1.7 cm and…

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Q: A recent study of the hourly wages of maintenance crew members for major airlines showed that the…

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Q: What is the probability that a transistor of this type will last at most 50 weeks? b. What is the…

A: Let , X→N(μ=40 , σ=5) Our aim id to find the following :  a. What is the probability that a…

Q: An electrical component is designed to provide a mean service life of 3000 hours, with a standard…

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Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 70 inches…

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Q: The lifetime of a certain type of automobile tire (in thousands of miles) is normally distributed…

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Q: Suppose that the waiting time for a license plate renewal at a local office of a state motor vehicle…

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Q: Q4) The time taken by a randomly selected applicant for a mortgage to fill out a certain form has a…

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Q: Assume that the heights of 6000 male students at a university are normally distributed with mean…

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Q: 4. The average salary for first-year teachers is $27,989. Assume the distribution is approximately…

A: Given,mean(μ)=$27,989standard deviation(σ)=$3250

Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 69 inches…

A: Here it is given that ,the heights of 18-year-old men are approximately normally distributed, with…

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Q: According to an annual survey conducted by TheKnot.com, the mean cost of a wedding in 2017 was…

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Q: (a) Based on a recent study, the monthly utility bills for three-room flats in Singapore can be…

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Q: Suppose that the mean daily viewing time of television is 8.35 hours per household. Use a normal…

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Q: What is the probability that the wages for a sample of 20 receptionists are less than $8/hour?

A: From given data we have: Mean μ=10.38, Standard deviation σ=2.05, n=20.

Q: From past experience, it is known that the number of tickets purchased by students standing in line…

A: Given μ=2.4σ=2.0

Q: A gasoline tank for a certain car is designed to hold 15 gallons of gas. Suppose that the variable ?…

A: It is given that the actual capacity of a tank follows normal distribution with mean 15.0 gallons…

Q: Suppose that the average outstanding credit card balance for young professionals is 11,200 with a…

A: GIVEN DATA, μ=11200σ=2600If n=150P(X<12300)=?

Q: The amount of time that a drive-through bank teller spends on a costumer is a random variable with a…

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Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 70 inches…

A: Given that, The heights of 18-year-old men are approximately normally distributed, with mean 70…

Q: 1.The heights of 18 year-old men are approximately normally distributed, with mean 66 inches and…

A: As due to the honor-code, we are authorized to answer only one question and that you haven't…

Q: Long distance telephone calls are normally distributed with a mean of 8 minutes and a standard…

A: Given that, Mean = 8 Standard deviation = 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.