The inside diameter of a cylindrical tube is a random variable with a mean of 3 inches and a standard devia-tion of 0.02 inch, the thickness of the tube is a random variable with a mean of 0.3 inch and a standard deviation of 0.005 inch, and the two random variables are indepen-dent. Find the mean and the standard deviation of the outside diameter of the tube.

Q: A manufacturer of hard safety hats for construction workers is concerned about the mean and the…

A: Given information Population mean, µ = 800 pounds Population standard deviation, σ = 40 pounds…

Q: At a large publishing company, the mean age of proofreaders is 36.2 years, and the standard…

A: Given Data, μ = 36.2σ = 3.7

Q: The average cholestrol content of a certain brand of eggs is 215 milligrams and the standard…

A:

Q: The weight of bags of apples is normally distributed with a mean of 10kg and a standard deviation of…

A: Let Xa be the weight of apple bags and Xc be the weight of carrot bags. Both, Xa and Xc are normally…

Q: The length of certain bricks is a random variablewith a mean of 8 inches and a standard deviation…

A: It is given that the length of bricks has mean 8 inch and standard deviation 0.1 inch. The thickness…

Q: The average cholesterol content of a certain brand of eggs is 225 milligrams, and the standard…

A:

Q: A random sample of 10 subjects have weights with a standard deviation of 12.0643 kg. What is the…

A: n = 10 s = 12.0643 kg.

Q: The actual weight of a bag of flour is modeled as a normal random variable with a mean of 0.25…

A: Given,   Mean = 0.25 Standard deviation = 0.02

Q: The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of 2.53…

A: Given that  Let X denotes the diameter of a brand of tennis  X~N(2.53, 0.04) Sample size (n)=10 Let…

Q: In a random sample of 8 cell​ phones, the mean full retail price was ​$521.70 and the standard…

A: A random sample of 8 cell​ phones, the mean full retail price was ​$521.70 and the standard…

Q: It is known from a previous study that in a factory producing steel ropes, the ropes drawn by ropes…

A: The standard deviation is 45 and the standard error is 12.

Q: Furnace repair bills are normally distributed with a mean of 263 dollars and a standard deviation of…

A: Here, µ = 263 and σ = 25.

Q: A set of data items is normally distributed with a mean of 20 and the standard deviation of 8.…

A: z-score: A z-score describes how many standard deviations a data item in a normal distribution lies…

Q: A psychologist reports that the average length of R.E.M. sleep in his test subjects was 10 minutes.…

A: Hypothesis Testing: Hypothesis is a procedure by which we can tests an assumption regarding a…

Q: The weight of a bag of sugar is normally distributed with mean of 550g and a standard deviation of…

A:

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

A: (a) Given: μ=25, σ=7 The corresponding z-value needed to be computed:  The probability that a…

Q: The amount of time between taking a pain reliever and getting relief is nomally distributed with a…

A: Let "X" be the time between taking the medication and getting relief.

Q: A manufacturer of car batteries claims that the life of the company’s batteries is approximately…

A: Hypothesis concerning a population variance; Suppose y1.y2........yn are the random sample from…

Q: standard deviation of 14.0751 kg. What is the variance of their weights? Be sure to include

A: Given : A random sample of 10 subjects have weights with a standard deviation of 14.0751 kg

Q: A homeowner estimates that within the range of likely temperatures his January heating bill, Y, in…

A: Given : Y = 290 - 5T Where T is a r.v with Mean (μT) = 24 S.D (σT) = 4

Q: The mean tar content of a simple random sample of 25 unfiltered​ king-size cigarettes is 20.8 ​mg,…

A: Given: n1=25x¯1=20.8s1=3n2=25x¯2=13.0s2=3.9

Q: The light bulbs produced by a generic manufacturer have a stated average life of 1,146 hours .…

A: Given, The lifetimes of the bulbs are normally distributed Mean, μ = 1146 Standard deviation, σ =…

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: A study claims tha.t on average, male high school students spend at least 3.39 hours a day playing…

A: The summary of the statistics is, x¯=4.12,σ=2.05,n=30μ=3.39 The formula for calculating the z-score…

Q: Assume females have pulse rates that are normally distributed with a mean of 72 beats per minute and…

A: Given that: Mean = 72 beats S. D. = 12.5 beats Sample size (n)  = 25 By using standard normal…

Q: random sample of 100,000 credit sales in a department store showed an average sale of $87.25. From…

A:

Q: A. C. Neilsen reported that children between the ages of 2 and 5 watch an average of 25 hours of…

A: Let x be the number of hours ages of 2 and 5 watch television which follows normal distribution with…

Q: the breaking of a particular rope is normally distributed, with the mean of 350 lbs. and a standard…

A:

Q: The lifetime of a particular component is normally distributed, with a mean of 1000 hours, and a…

A: Consider X be a random variable which, follows normal distribution, indicates the lifetime of a…

Q: It is desirable to compare the yields of two different types of wheat seeds. An average of 575 kg of…

A:

Q: A sample of 100 resistors has an average resistance of 50 Ω and a standard deviation of 5 Ω. A…

A: Given that, A sample of 100 resistors has an average resistance of 50 Ω and a standard deviation of…

Q: he weight of the package is normally distributed with a mean of 650 g and a standard deviation of 42…

A: Given that  The weight of the package is normally distributed with a mean of 650 g and a standard…

Q: The strength of steel wire made by an existing process is normally distributed with a mean of 1550…

A: The strength of steel wire made by an existing process is normally distributed with mean 1550 psi…

Q: A manufacturer of hard safety hats for construction workers is concerned about the mean and the…

A:

Q: An electrical appliance made by company A has an average life of 2500 hours, with a standard…

A: Given that For Company A  Population mean=2500 hours Standard deviation =500 hours  Sample size=300…

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 468…

A: Given values, Now, calculate the z value

Q: The mean tar content of a simple random sample of 25 unfiltered king-size cigarettes is 21.1 mg,…

A: Given Information: Unfiltered king size cigarettes: Sample size n1=25 Sample mean x¯1=21.1 Sample…

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 568…

A: Givan Mean=568 standard deviations=76

Q: The times to pop a regular bag of microwave popcorn without burning it are Normally distributed with…

A: Given that  The times to pop a regular bag of microwave popcorn without burning it are Normally…

Q: The arrival schedule of an ETS train from Kuala Lumpur to Sungai Petani follows a normal…

A: Given: X~N(μ,σ)μ=0954σ=7.4 The train is expected to arrive at 0948.

Q: A potential buyer wants to decide which of the two brands of electric bulbs he should buy as he has…

A:

Q: he weight of 10 boxes of a certain brand of cereal have a mean content of 278 grams with a standard…

A: Given : Sample size of boxes = 10 w : Weight p : Price Mean (X¯w)=278S.D (Sw)=9.64Mean (X¯p)=1.29S.D…

Q: The owner of a coin-operated hot coffee machine has received claims that there is an error in his…

A: Given: x¯=7.93s=0.38n=46 Hypothesis: Null hypothesis: H0: μ=8Alternative hypothesis: H1: μ<8 The…

Q: An electrical firm manufactures light bulbs that have a lifetime that is approximately normally…

A:

Q: The mcat scores are normally distributed with a mean of 500, and a standard deviation of 10.6. Find…

A: Given data normally distributed with mean of 500 and standard deviation of 10.6.Let ‘X’ be a…

Q: The times to pop a regular bag of microwave popcorn without burning it are Normally distributed with…

A:

Q: The light bulbs produced by a generic manufacturer have a stated average life of 1,146 hours .…

A: Given: X~N(μ,σ)μ=1146σ=100

Q: The photoresist thickness of wafers in semiconductor manufacturing has a mean of 10.6 micrometers…

A: Let, X=The photoresist thickness of wafers.  Given that X follows a normal distribution with…

Q: The average cholesterol content of a certain brand of eggs is 215 milligrams, and the standard…

A: Let X denote the cholesterol content of a certain brand of eggs and it follows normal distribution…

Q: The average cholesterol content of a certain brand of eggs is 215 milligrams, and the standard…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at 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.