1.If the cosmic radiation to which a person is exposed while flying by jet across US is a random variable having mean 4.35 mrem and standard deviation 0.59 mrem,find the probabilities that the amount of cosmic radiation to which a person will be exposed on such a flight is (a) Between 4.00 and 5.00 mrem (b)At least 5.50 mrem (c)Less than 4.00 mrem

Q: The average mark (out of 100) of a class of 300 students on a statistics examination is 68.2 with…

A:

Q: The manufacturer of a new compact car claims the miles per gallon (mpg) measurement for the fuel…

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Q: An automobile battery manufacturer claims that its mid grade battery has a mean of 50 months with a…

A: μ=50σ=6Normal distribution a) P( x>51) =P(x-μσ>51-506) =P(z>0.1667) =0.4338 (there fore 2…

Q: The owner of a fish market has an assistant who has determined that the weights of rainbow trout are…

A: Mean(µ) = 3.6Standard deviations (σ) = 1.2n = 16

Q: (3) The manufacture of a certain part requires two different machine operations. The time on machine…

A: Given : X1=machin 1X2 =machin 2 For machines 1. μ1=4σ1=1 For machines 2.  μ2=4.5σ2=1.5

Q: he taxi and takeoff time for commercial jets is a random variable x with a mean of 8 minutes and a…

A: Solution: Let x be the taxi and takeoff time for commercial jets has normal distribution with mean…

Q: The output voltage of a power supply is normally distributed with mean 5 V and standard deviation…

A: Step 1:Given data : Mean μ=5Standard deviation σ=0.02Let X be the random variable that represents…

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

A: Mean(μ)=3.8 standard deviation(σ)=1.8 sample size(n)=81

Q: life

A: Total Life of 40 Batteries:Given:Collection of 40 batteries: Each battery is equally likely to be…

Q: The highway department in a mid-size downtown has enough salt to handle a total of 80 inches of…

A: Number of days 50Mean of X1.5 inchesStandard deviation of X 0.3 inchesnow, we find the mean and…

Q: A certain mutual fund invests in both U.S. and foreign markets. Let x be a random variable that…

A: Given, μ=1.9σ=0.5 a) The random variable x is a mean of a sample size 400. Therefore by central…

Q: The taxi and takeoff time for commercial jets is a random variable x with a mean of 9 minutes and a…

A: Given : Mean = μ = 9 Standard deviation = σ = 2.8 sample size = n = 33

Q: A population has a standard deviation of 34. We take a random sample of size 30 from this…

A: Given: Population standard deviation σ = 34 Sample size n = 30

Q: Suppose the force acting on a column that helps support a building is a normally distributed random…

A: GivenMean(μ)=13.0standard deviation(σ)=1.5

Q: Suppose X is a normal random variable with mean=5 and variance=0.5. a) If sample size = 50. P(35) =…

A: (a) The value of P3<x¯<5 is 0.5, which is obtained below:…

Q: Suppose that a poll of 18 voters is taken in a large city. The random variable x denotes the number…

A: Solution-: Given: n=18,p=0.43 (Or 43%) What is the mean and standard deviation of X?

Q: random variable X has a mean value of 20 with a standard deviation of 4.  If we obtain a random…

A: The probability that the sample average of X is at most 19 = P(X<=19) = 0.0228

Q: for a normally distributed random variable X with mean of 177.15 and standard deviation of 4.95 a…

A: It is given that the mean is 177.15 and the standard deviation is 4.95.

Q: 4. (Random Variables). (i) A coin weighted so that P(H) = 19/36 and P(T) = 17/36 is tossed four…

A: note : As per our company guidelines we are supposed to answer ?️only the first question. Kindly…

Q: Find the probability that, for a random sample of 16 US adult women, the sample mean is between 98.0…

A: We want to find the probability of sample means  P(98.0<x̄<99.0)

Q: Assume that for the population of MBA (Supply Chain Management), the average starting salary is PKR…

A: From the provided information, Mean (µ) = PKR 72,000/- Standard deviation (σ) = PKR 20,000/-

Q: In a certain geographical region, the annual rainfall is normally distributed with a mean of 102.2…

A:

Q: A random variable X has a mean value of 20 with a standard deviation of 4.  If we obtain a random…

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Q: Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is…

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Q: The taxi and takeoff time for commercial jets is a random variable x with a mean of 9 minutes and a…

A:

Q: A random variable X represents the scores of CCBA students in BUSS 304, which is normally…

A: Given : Let X  represents the scores of CCBA students in BUSS 304 It is normally distributed with…

Q: what is the probability that at least one will be working when I return?

A: Here given, The length of life of a certain brand of light bulb is normally distributed with a mean…

Q: We select a random sample of (36) observations from a population with mean (81) and standard…

A: From the provided information, Mean (µ) = 81 Standard deviation (σ) = 6 Sample size (n) = 36

Q: Suppose that the population mean flight time between cities 1 and 2 is 240 minutes with a population…

A: Given that.   X~N( μ , ?^2 )   μ=240     , ?=20   Z-score =( x - μ )/?

Q: Adult male whistle pigs have weights that are normally distributed with a mean of 3.83 kg and a…

A: Note: " Since you have asked multiple questions, we will solve the first question for you. If you…

Q: A certain mutual fund invests in both U.S. and foreign markets. Let x be a random variable that…

A: A) Using the central limit theorem we can say that x has an approximately normal distribution.  (As…

Q: A particular fruit's weights are normally distributed, with a mean of 382 grams and a standard…

A: A continuous random variable X is said to follow Normal distribution with parameters μ and σ2 if its…

Q: Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is…

A:

Q: Scores on a standard test of mechanical aptitude are normally distributed with a mean of 72 and a…

A:

Q: If XX represents a random variable coming from a normal distribution with mean 5 and if…

A: given data  normal distribution  μ = 5 P(x>6.7) = 0.28 P(5<x<6.7) = ?

Q: Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is…

A: Given,sample size(n)=25mean(μ)=2.64standard deviation(σ)=0.80

Q: A random sample of size n = 81 is taken from a normal population with mean 52.6 and standard…

A: The probability to that the mean of the sample will be less than 50.5 is obtained below as follows:…

Q: Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is…

A: