The print on the package of 100-watt General Electric soft-white light-bulbs says that these bulbs have an average life of 750 hours. Assume that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Find the probability that the mean life of a random sample of 25 such bulbs will be a. greater than 725 hours. Round your answer to four decimal places. i b. between 730 and 740 hours. Round your answer to four decimal places. i c. within 25 hours of the population mean. Round your answer to four decimal places. i

Q: Assume that a distribution of 10000 scores is normally distributed with a mean of 90 and a standard…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ= 105 and a standard…

A: given data normal distributionμ = 105σ = 15p(X<129) = ?

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

A: It is given that the mean is 0 and the standard deviation is 1.

Q: C. O D. of B.

A: Given: μ=0σ=1

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

A:

Q: Assume that a distribution of 10000 scores is normally distributed with a mean of 90 and a standard…

A:

Q: The number of ants per acre in the forest is normally distributed with mean 42,000 and standard…

A:

Q: The mean amount of time it takes a kidney stone to pass is 13 days and the standard deviation is 4…

A: Givenmean(μ)=13standard deviation(σ)=4Let x=time to pass the kidney stone

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

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: A population of scores has μ = 40 and σ = 5. If 3 points are deducted to every score in the…

A:

Q: Assume that blood pressure readings are normally distributed with a mean of 125 and a standard…

A: Solution: Let X be the blood pressure. From the given information, X follows normal distribution…

Q: hts per a 12,370. Let X = number o places where possible.

A: Here it is given that X denotes the no of ants in a randomly selected acre of a forest. Mean (μ) =…

Q: Given a distribution that has a mean of 37 and a standard deviation of 12, calculate the probability…

A:

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

A: From the provided information, Mean (µ) = 0 Standard deviation (σ) = 1 Let X be a random variable…

Q: The probability that a randomly selected adult has an IQ less than 128 is (Type an integer or…

A: Given:  Consider X as a random variable that follows a normal distribution with mean 22 and…

Q: A set of exam scores is normally distributed and has a mean of 79.3 and a standard deviation of 7.4.…

A: Given datanormal distribution μ=79.3σ=7.4choose a random score less than or equal to this 0.0078we…

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

A: Here, µ=0°C, σ=1.00°C.

Q: e. The probability that the number will be larger than 29 is P(x > 29) = f. P(x > 11 | x < 14) -| g.…

A:

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

A: Given: X follows normal distribution with μ=00C Standard Deviation σ=1.000C

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121…

A: The given data are: Mean = 121 Standard Deviation= 22 (a) Stage 2 high blood pressure occurs if…

Q: Private nonprofit four-year colleges charge, on average, $27,363 per year in tuition and fees. The…

A: Given information: μ=27363σ=6865 b) The probability that a randomly selected Private nonprofit…

Q: Reading scores. The grade-level reading scores from a reading test given to a random sample of 12…

A: The​ grade-level reading scores from a reading test given to a random sample of  students in an…

Q: Joan's finishing time for the Bolder Boulder 10K race was 1.77 standard deviations faster than the…

A: There are 415  women who ran in Joan's age group. As, z=x-μσ~N0,1 In this case, it is mentioned that…

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

A: The mean and standard deviation are 0 and 1, respectively.

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a…

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

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

A: Given that,Mean = 0Standard deviation = 1Z scores are -1.66 and 1.66

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability. IQ test…

A:

Q: Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard…

A: The given information is that the readings on thermometers are distributed normally with mean 0 and…

Q: a. In a normal distribution, a = - (right or left) of the mean. b. -2, z = 6. This tells you that x…

A:

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

A:

Q: The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean…

A: Given: X is the number of calories consumed. Population mean μ=2929 Population standard deviation…

Q: Mary drives to work each morning, and the trip takes an average of µ = 38 minutes. The distribution…

A: Given: µ = 38 minutes,  σ = 5 minutes. The Z follows standard normal distribution. Z=X-μσ