A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.4 years, and standard deviation of 0.8 years. If 19 items are picked at random, 10% of the time their mean life will be less than how many years? (Give answer to one decimal place)

Q: The population of weights of a particular fruit is normally distributed, with a mean of 568 grams…

A: The objective of this question is to find the weight in grams such that 8% of the time, the mean…

Q: Suppose a population is known to be normally distributed with a mean, equal to 116 and a standard…

A: Given dataMean = 116Standard deviation = 14Probability that population would be between 116 and 130…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.5…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.3…

A: Let X = Lifetime X~N(μ,σ) μ=10.3σ=2.2

Q: The mean age of a class of twenty-five students is 23.8 years. How old would a twenty-sixth student…

A: The mean age of a class of twenty-five students is 23.8 years. The formula to calculate the mean…

Q: Twenty-eight percent of U.S. employees who are late for work blame oversleeping. You randomly select…

A: Solution: Let X be the number of U.S. employees who are late for work and blame oversleeping. The…

Q: Suppose that a laboratory analyzes biological specimens to determine the concentration of toxins.…

A: Given:

Q: Today, the waves are crashing onto the beach every 5.6 seconds. The times from when a person arrives…

A: As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted.....…

Q: With a height of 64 in, Marvin was the shortest president of a particular club in the past century.…

A:

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: Population mean, Population standard deviation, To find:

Q: Suppose that resting pulse rates among healthy adults are normally distributed with a mean of 75…

A:

Q: Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.2…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13.8…

A:

Q: A population of scores has a mean of ? = 35 and ? = 3.5. Find the z-scores that correspond to the…

A: Solution- Given that mean mu=35 and standard deviation s=3.5 Find Z score for corresponding X values…

Q: Suppose a population is known to be normally distributed with a mean, equal to 116 and a standard…

A: The percentage of the population would be between 116 and 144 is obtained below:It is given that the…

Q: The population weights of a particular fruit is normally distributed, with a mean of 689 grams and a…

A: Given: μ = 689 σ = 30 n = 18 The value of z at 4%, i.e., corresponding to the right to the 4% area…

Q: Suppose that a category of world class runners are known to run a marathon (26 miles) in an average…

A: Given that μ=142σ=13n=49

Q: The following is the average daily temperature for Portland, Oregon for the month of July: 81 70 71…

A: class                         frequction icon                frequency70 - 74…

Q: SAT scores are normed so that, in any year, the mean of the verbal or math test score should be 500…

A: Reviewing information, X : SAT scores of students for math test  Mean=500 Sd=100

Q: Suppose that the weight of a particular hand weight is advertised to be 5 pounds, but it can…

A: Given: a = 4.9 b = 5.5 Formula Used: Standard deviation = b-a12

Q: The mean and standard deviations of individual purchases in our grocery store is $100.83 and $12.15…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.5…

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: A particular fruit's weights are normally distributed with a mean of 598 grams and a standard…

A: Given  mean= 598, standard deviations=34, n=4

Q: A vendor converts the weights on the packages she sends from pounds to kilograms (1 kg ≈ 2.20 lb).…

A: Step 1: Solution: Given the relationship between kg and pounds (lb), 1 kg=2.2 lb mean weight of the…

Q: A 1995 study shows that since records were first kept in a meteorologist's hometown, the average…

A: Solution: Let X be the temperature during the month of May. From the given information, n=25,…

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample 9 from the…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.1…

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 3% can…

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

A: Let X be the random variable from normal distribution with mean (μ) = 100 and standard deviation (σ)…