Assume that the time spent online by customers is normally distributed with a mean of 35 minutes and a standard deviation of 5 minutes. Find: the probability a customer spends less than 30 minutes on the site the probability a customer spends more than 44 minutes on the site the probability a customer spends between 32 and 40 minutes on the site

Q: Let the weights of 1 kg tea boxes filled with an automatic machine have a normal distribution with a…

A: Given data, mean=1.03 sd=0.02

Q: 24 Light bulbs, having a mean life of 2400 hours and standard deviation of 62 hours, are used for a…

A: Given data, Mean=2400 sd=62 n=4000

Q: The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean…

A: a)It is given that the mean is 21 and standard deviation is 5.

Q: The amount of time an athlete spends working out on a treadmill is normally distributed.  With a…

A:

Q: The table below shows the distribution of test grades for 40 IB students at Magentadale School. Test…

A: a. The test grade of 40 students are given.

Q: b) The number of newspapers sold daily at all 7-eleven outlets nationwide is normally distributed…

A:

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A:

Q: brisk walk at 4 miles per hour, burns an average of 300 calories per hour. If the standard deviation…

A: Given Data Population Mean,μ = 300.0 Population Standard Deviation,σ = 8.0

Q: Find the probability that 1 man has weight greater than 160 lb. Assume that weights of males are…

A: Let X represent the random variable Mean=182.9 SD=40.8   X~ Normal (182.9, 40.82)

Q: The amounts of time per workout an athlete uses a stair climber are normaly distributed, with a mean…

A: From the given information,   Mean = 23 Standard deviation = 7   The objective is to find the…

Q: An electrical firm manufactures light bulbs that have a life, before burn-out, that is normally…

A:

Q: A bank teller serves customers standing in line.  Based on prior data, the average service time per…

A: Given that  Mean of X=4 Standard deviation of X=1.2 n=40

Q: The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a…

A: Obtain the probability that a randomly selected athlete uses a stair climber for less than 22…

Q: The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean…

A: It is given that the amount of time an athlete uses a stair climber follows normal distribution with…

Q: The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a…

A:

Q: The average number of pounds of meat that a person consumes a year is 218.4 pounds. Assume that the…

A: a) Let X be a random variable such that X: Number of pounds of meat that a person consumes a year…

Q: The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean…

A: X follows a Normal distribution with mean = 21 and S.D = 6 Then z=(x-mean)/SD = (x-21)/6  follows…

Q: The average number of acres burned by forest and range fires in a large county is 4200 acres per…

A: Given data: Mean = 4200 acers Standard deviation = 800 acers Let ,X = be the number of acers burned…

Q: The length of time it takes college students to find a parking spot in the library parking lot…

A: Mean = 6.5 Standard deviation = 1

Q: Assume that the salaries of elementary school teachers in the United States are normally distributed…

A: The provided information are: Population meanμ=31,000Standard deviationσ=3000 Consider, X be the…

Q: The average time a person spends shopping in a grocery store is 43 minutes.  If the time is normally…

A: Given:  The average time a person spends shopping in a grocery store is 43 minutes.  The time is…

Q: Let assume that a male kangaroo heights are normally distributed with a mean 71 inches and a…

A: The mean of the height of the kangaroo is 71 inches. The standard deviation of the height of the…

Q: The duration of an NBA basketball game during the 2019-20 season is normally distributed with the…

A: "Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Each American uses an average of 650 pounds (295 kg) of paper in a year. Suppose that the…

A: It is given that mean and standard deviation are 650 and 153.5, respectively.The random variable X…

Q: An electrical firm manufactures light bulbs that have a length of life that is normally distributed…

A: mean = μ = 817standard deviation = σ = 24 We have to find probability that bulb burns between 723…

Q: The amounts of time per workout an athlete uses a stair climber are normaly​ distributed, with a…

A: From the provided information, Mean (µ) = 23 Standard deviation (σ) = 7 X~N (23, 7) Here X be a…

Q: The lifespans of the light bulbs produced by a Filip Company are normally distributed with a mean of…

A: GivenMean(μ)=1150standard deviation(σ)=175

Q: Exercise 1: Assume that IQ scores are normally distributed with a mean of (120+m) and a standard…

A:

Q: The amount of time required for a mechanic to replace a clutch is normally distributed with mean 90…

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

A: From the given information, Test scores that is X is normally distributed woth mean 0 and standard…

Q: Paramesan cheese is aged for an average of 24 months to allow it to develop the desire richness in…

A:

Q: The amount of time required for a mechanic to replace a clutch is hormally distributed with mean 90…

A: Consider a random variable X which represent time taken by mechanic to replace the clutch The…

Q: The average annual precipitation for a large Midwest city is 30.85 inches with a standard deviation…

A: We have given that.   X~N( μ , ?^2 )   μ =30.85 , ? = 3.6   , n= 32   Z-score =( x - μ )/?

Q: The mean weight of loads of rock is 42.0 tons with a standard deviation of 12.0 tons. If 25 loads…

A: Given,sample size(n)=25mean(μ)=42standard deviation(σ)=12

Q: a) Assume that a root beer factory produces an average of 100,000 gallons of root beer per day, with…

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Q: A speed camera on Peterson Road records the speed of each passing vehicle. The speeds are pund to be…

A:

Q: The average number of acres burned by forest and range fires in a large county is 3,900 acres per…

A: Define the Random Variable, X : Number of acres burned by forest and range fires Given that, X ~…

Q: The amount of tip the servers in an exclusive restaurant receive per shift is normally distributed…

A: Let X be a random variable representing the amount of tip the servers in an exclusive restaurant…

Q: e average height of mall giraffes is 16.3 feet. If the heights are normally distributed with a…

A: Given data,Mean μ=16.3sd σ=3.2P(15<X<20)=?

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

A: Let X be the reading on the thermometer. Here, X~N(0,1). Then, probability of obtaining a reading…

Q: The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean…

A:

Q: The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean…

A: Given,mean(μ)=22standard deviation(σ)=5

Q: A city installs 2000 electric lamps for street lighting. These lamps have a mean burning life of…

A:

Q: Assume that the people’s ages at the onset of a certain disease have a normal distribution with a…

A:

Q: a. Determine the probability that the​ watch's battery will last longer than 3.8 years. b. Calculate…

A: a. The random variable X is defined as the life of the battery which follows normal distribution…

Q: The duration of an NBA basketball game during the 2019-20 season is normally distributed with the…

A: As per the guidelines we are allowed to solve maximum of 3 sub parts If you need help with other…

Q: The duration of an NBA basketball game during the 2019-20 season is normally distributed with the…

A: From the provided information, Mean (µ) = 159 minutes Standard deviation (σ) = 9.1 minutes Let X be…

Q: The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a…

A:

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.