A manufacturing plant uses 3000 electric light bulbs whose life spans are normally distributed, with mean and standard deviation equal to 500 and 50 hours, respectively. 1. 2. 3. 4. How many bulbs in this manufacturing plant will last at most 600 hours? How many light bulbs in this manufacturing plant will last for more than 600 hours? What is the probability that a randomly selected bulb in this manufacturing plant will last from 457 to 598? After how many hours should the light bulbs be replaced the manufacturing supervisor wishes no more than 20% of the bulbs to burn out between replacement periods?

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.8 and a standard…

A: Let "X" be the IQ score of the adults.

Q: Human body temperatures are normally distributed with a mean of 98.2 degrees and a standard…

A: Solution

Q: A population has a mean of 80 and a standard deviation of 7. A sample of 49 observations will be…

A: Given Information: Mean μ=80 Standard deviation σ=7 Sample size n=49

Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…

A: Given that, working in the garden pulling weeds/planting flowers burns an average of 200 calories…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.9 and a standard…

A:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: Answer Sample size [n] =50Mean =196Standard deviation =22

Q: At an airline company, according to the records, the mean age of pilots is 36.2 years, and the…

A:

Q: A quart of Parker's milk contains a mean of 39 grams of butterfat, with a standard deviation of 2…

A: Mean = 39 Standard deviation = 2

Q: The lengths of pregnancies are normally distributed with a mean of 266days and a standard deviation…

A:

Q: population has a mean of 91 and a standard deviation of 10. A sample of 25 observations will be…

A: μ = 91σ = 10n = 25P(87.56<x¯<96.3) = ?

Q: Number 16

A: Provided information is, in recent study of 20 individuals found that the average number of therapy…

Q: 18 men will be tested for the discus throw. if Mu= 112ft and standard deviation= 13ft. find the…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: A, you find d deviation - hours wor probability many peop. orobability ne)? How m

A: The probability that a person will work more than 60 hours is given by P(X>60) =P(X-uσ>60-uσ)…

Q: Suppose that the number of hours that an adult watches in a day has a mean of 2.4 hours and a…

A: Given: i. Calculate the corresponding Z score as follows: The diagram corresponding to the mean…

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: About 7% of the population has a particular genetic mutation. 183 people are randomly selected.…

A: Given Information: Number of people, n = 183 Percentage of population has a particular genetic…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: Assume that for the population of all unemployed individuals in Minnesota, the population mean…

A:

Q: The lifetime of a particular brand of AA batteries follows a normal distribution. The mean lifetime…

A: Correct answer is d. 0.8944

Q: Find the probability that a randomly selected adult has an IQ greater than 136.4

A: Let X denote the IQ scores of adults. Given that X follows N(mean = 101.3, SD = 20.2), then  Z = (X…

Q: If n=7 (days in a week) and p=0.45 (the probability that the food truck operates on a single day),…

A: Given information- Sample size, n = 7 The probability that the food truck operates on a single day…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.9 and a standard…

A:

Q: Ryan is throwing a football through a tire in his backyard. He has the probability of .30 of…

A:

Q: If x=26,412 tuition per a four year and n=7,498 is standard deviation. Assuming the distribution is…

A: From the provided information, Mean (µ) = 26412 Standard deviation (σ) = 7498 X ~N (26412, 7498)

Q: A certain brand of car tends to break down on average after 115,000miles with a standard deviation…

A: The objective of this question is to find the probability that the average breakdown mileage of a…

Q: jogs to the park each day and the trip takes an average of µ = 22 minutes. The distribution of jog…

A: given data,normal distribution μ=22σ=10probability that Susan's jog to the park take less than 16…