A research group gathers data on the lifetimes of light bulbs (exciting, I know). The find the average lifetime of a light bulb to be 830.7 hours with a standard deviation of 85.2 hours. Assuming a Gaussian distribution in the data, what is the probability (given in percent) of a light bulb have a lifetime of greater 890.0 hours? Report your answer in a percentage to the 1/100ths place.

Q: Activity 2 of 3 What percent of Braves players fall between 230 and 270? O A. 95.4% O B. 47.7% O C.…

A: Answer Option c = 68.2% is correct

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: According to the given information, we have Mean = 5 minutes Standard deviation = 1 minutes

Q: From 1776-1800, the average age of first marriage for a male in Western Europe was 26.4 years, with…

A: The question is about normal distributionGiven :Average age of first marriage for males ( ) = 26.4…

Q: The life of a vacuum cleaner is normally distributed with mean of 2 years and a standard deviation…

A: Given: Mean(μ)  = 2 years Standard deviation (σ) = 1 years

Q: Part D please

A: Here X has normal distribution with mean of 75847 and standard deviation of 33800 We have to find…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.4…

A: Population mean, Population standard deviation,

Q: A math class completes an exam and it is found that the class mean is 85 and the standard deviation…

A: The Chebyshev's theorem and Empirical rule is use to calculate the proportion or percentages of…

Q: Females have pulse rates that are normally distributed with a mean of 74 beats per minute and a…

A:

Q: Trucks in a delivery fleet travel a mean of 130 miles per day with a standard deviation of 39 miles…

A: The data on per day mileage of a delivery truck is normally distributed. Population mean, Population…

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: Assume that the readings on thermometers are normally distributed with a mean of 0 degrees Celsius…

A: We have given that Mu= 0 , sigma =1 X~ N ( 0, 1) Zscore=(x-mu)/sigma

Q: The Atlanta Braves baseball team has a mean batting average of 250 with a standard deviation of 20.…

A: We have to find given probability.

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6…

A: Mean=M=6, Standard deviation=S=3X~N(M=6, S=3)

Q: The following table lists the income tax rates for a single person earning $50,000 per year for…

A:

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 225and the mean…

A: The probability of a bulb lasting for at most 540 hours is calculated below:

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 7…

A:

Q: Trucks in a delivery fleet travel a mean of 120120 miles per day with a standard deviation of 3333…

A: Given that, Mean (m)=120 Standard deviation (sd) = 33 The mileage per day is distributed normally.…

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours…

A: Denote X as the life of a randomly selected light bulb.

Q: For a certain group of individuals, the average heart rate is 74 beats per minute. Assume the…

A:

Q: Assume that at the average age of a population of wild turtles is normally distributed with mean age…

A: In question,  Let X be random variable denoting the age of a population of wild turtles.  Given, X ~…

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: y=3.1  n= 1.6 standard deviation  Find probability that the child spends less than 3.4 hours a day…

A: Given that If  y=3.1  n= 1.6 standard deviation

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: Here, mean is 5 and standard deviation is 3. We will use z-standard normal distribution.

Q: Suppose that replacement times for washing machines are normally distributed with a mean of 8.8…

A:

Q: The length of time, L hours, that a phone will work before it needs charging is normally distributed…

A: The length of time that a phone will work before it needs charging is normally distributed with  Let…

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is…

A:

Q: Scores on the SAT test have a mean of 1518 and a standard deviation of 325. If 100 students are…

A: Scores on the SAT test have a mean of 1518 and a standard deviation of 325.

Q: Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 38 miles…

A:

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 25 hours…

A:

Q: According to the latest internet usage survey of college students, the amount of time spent on…

A: From the provided information, Mean (µ) = 210 minutes Standard deviation (σ) = 45 minutes X~N (210,…

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)…

Q: Trucks in a delivery fleet travel a mean of 100100 miles per day with a standard deviation of 3535…

A: The objective of this question is to find the probability that a truck drives less than 148 miles in…

Q: The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of…

A: