Suppose that the mean and standard deviation of plants height are 130 and 42, respectively, if a random sample of size 64 is slected from these plants, then the probability that their average height is more than 125 is closest to:

Q: Among the workers at a large factory, the number of sick days taken per year is normally…

A: Given that, Among the workers at a large factory, the number of sick days taken per year is normally…

Q: For a population With a mean of 75 and a standard deviation of 12, what is the probability that a…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 9.7 inches,…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: An electrical company claims that the average life of the bulbs it manufactures is 1 300 hours with…

A: According to central limit theorem if the population is normal or the sample size is at least 30,…

Q: The accountants of a known auditing firm have a mean daily salary of P850 with a standard deviation…

A: X~N(μ= 850 , σ= 82 ) μ= 850 , σ= 82 Formula for Z-score Z=(X-μ)/σ

Q: If x is a normally distributed variable with a mean of 151.7 and a standard deviation of 21.9, what…

A: GivenMean(μ)=151.7standard deviation(σ)=21.9

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 10.6…

A: Obtain the Z-score for the random variable X equals 8.9. The Z-score for the random variable X…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 10.8…

A:

Q: Suppose a population has a mean of 400 and a standard deviation of 24. If a random sample of size…

A: Given that, mean = 400 standard deviation =  24 n = 144

Q: Suppose the grades in a finite mathematics class are normally distributed with a mean of 75 and a…

A: Given Data: The mean of the distribution is: μ=75 The standard deviation of the distribution is: σ=5…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 13.5…

A: Let "X" be the length of the items.

Q: Assume that the salaries of elementary school teachers are normally distributed with a mean $35,000…

A:

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

A:

Q: Suppose that the miles-per-gallon (mpg) rating of passenger cars is a normally distributed random…

A:

Q: Suppose a population has a mean of 400 and a standard deviation of 24. If a random sample of size…

A:

Q: Suppose that the annual household income in a small Midwestern community is normally distributed…

A: Given : X ~ Nμ, σ mean, μ = $55000 S.D, σ = 4500 a. P(household will have an income between $50000…

Q: A population has a standard deviation of 16. If a sample of size 64 is selected from this…

A: Given: Population standard deviation = sigma = 16 n = 64 P( sample mean within 2 units from…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 18.8…

A: The probability that it is less than 18.8 inches long when one item chosen at random is obtained…

Q: Suppose that the latest census indicates that for every 10 young people available to work only 4 are…

A: Solution: Let X represent the number of people are employed.  The probability of people are employed…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 19.4…

A:

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 13.9…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 19.3 inches…

A: It is given that the mean is 19.3 and the standard deviation is 2.

Q: Suppose that the weights of the people in a certain office building are normally distributed, with a…

A: Given  μ=150, σ=20, n=16  Note: This probability value calculated from standard normal distribution…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 11.9…

A: Mean = 11.9 Standard deviation = 1.3

Q: Suppose it is known that the weight of a certain population of individuals are approximately…

A: Let, X=the weight of a certain population Given that X follows a normal distribution with mean=80…

Q: An electrical company claims that an average life of bulbs it manufactures is 1200 hours with a…

A: Given that : μ= 1200 hour  ? = 250 hours  n = 100 By using the central limit theorem we solve this…

Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57…

A: Given X is normal Distributed with mean µ = 57.0 and standard deviation σ = 3.5 now will using…

Q: Suppose that an airline uses a seat width of 17.2 in. Assume men have hip breadths that are normally…

A: Let "X" be the hip breadths of men.

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 605…

A:

Q: 1.) The average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs…

A: 1) Given that the mean is $55 and the standard deviation is $8. The costs are normally distributed.…

Q: Suppose that family incomes ina town are normally distributed with a mean of $1,200 and a standard…

A: Mean = 1200 Standard deviation = 600

Q: Suppose the number of movies people rent per month is normally distributed with a mean of 4.8 and a…

A: Let x be the number of movies people rent per month which follows normal distribution with mean 4.8…

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A: Solution: We are given:

Q: Suppose the heights of 18 year old men are approximately normally diatributed, with mean 67 inches…

A: Mean = 67 Standard deviation = 5

Q: For a certain type of computers, the length of time between charges of the battery is normally…

A: According to the provided information, Mean (µ) = 50 hour Standard deviation (σ) = 15 hour

Q: If the weights of sheep are considered normally distributed with a mean of 60 kg and a standard…

A: let  x is defined as the weights of sheep are considered normally distributed with a mean of 60 kg…

Q: At a certain beer bottling plant, the amount of beer that is put in a bottle is known to be…

A:

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 526…

A:

Q: Suppose that chemistry exam scores are normally distributed with a mean of 24 and a standard…

A: Let X denote exam scores. Given that X follows N(mean = 24, SD = 4)

Q: Suppose that the monthly charges for cell phone plans in the United States are normally distributed…

A:

Q: Suppose a population has a mean of 90 and a standard deviation of 28. If a random sample of size 49…

A:

Q: 3. Suppose that the IQ scores of Grade 11 students of OSFI is normally distributed with a mean of…

A:

Q: Suppose that an airline uses a seat width of 16.7 in. Assume that men have hip breadths that are…

A: Mean = 14.2 Standard deviation = 1

Q: A manufacturing company measures the weight of boxes before shipping them to the customers. If the…

A: Given, µ=90 σ=24 n=36

Q: Assume women’s heights are normally distributed with a mean of 63.6 inches and a standard deviation…

A:

Q: Suppose that weights of one-pound bags of apples follow the normal distribution with the mean of 1…

A: Given Population mean μ=1, standard deviations σ=0.2,  Let X be the weight of one pound bags off…

Q: The weights of the fish in a certain lake are normally distributed with a mean of 15 lb. and…

A: Consider X be a random variable which follows normal distribution indicates the weight of fish. The…

Q: Suppose that an airline uses a seat width of 16.3 in. Assume men have hip breadths that are normally…

A: It is given that the mean is 14.5 and standard deviation is 11.

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 538…

A: