For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200 hours and a standard deviation equal to 120 hours, what burning time is identified with the    upper 50 percent?    lower 75 percent?    lower 1 percent?    middle 90 percent?

Q: number 4

A: A frequency table is used to understand the number of times an observation occurs. The cumulative…

Q: Assume that the hourly costs of operating a commercial aircraft are normally distributed with a mean…

A:

Q: n a set of score, the coefficient of variation (in percentage terms) = 50% and standard deviation =…

A: The coefficient of variation is the ratio of the standard deviation to the mean. It is a measure of…

Q: Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets…

A: Let us define the random variable X as the amount of sleep an adult gets per day is normally…

Q: Suppose the people living in a city have a mean score of 40 and a standard deviation of 7 on a…

A: As per guidelines, we will only solve first three subparts, please repost other questions for more…

Q: The mean of a normal disiribution is 50 and standard deviation is 12.5. Calculate the 60th, 65th and…

A: Given,mean(μ)=50standard deviation(σ)=12.5

Q: what percent of values fall between 5.25 and 8.75 if the mean =9 and standard deviation =2.36

A: Answer: From the given data, Mean (μ) = 9 Standard deviation (σ) = 2.36 X follows normal…

Q: In a Normal distribution 7% items are under 35 and 89% are under 63. Find its mean and standard…

A:

Q: What is the logistic regression equation?   How would you interpret an odds ratio for a continuous…

A: The logistic regression is use to model the probability of events where who has two possibilities…

Q: a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean…

A: We have to find 60th percentile.

Q: Suppose the life span of a brand of lightbulbs is normally distributed with a mean of 2000 hours and…

A: It is given that  Mean, μ = 2000 Standard deviation, σ = 320 Z-Score, Z = ( X - μ )/σ

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…

A: Introduction: The fashionable regular distribution, additionally called the z-distribution, is a…

Q: For the given set of data: {63, 97, 45, 59, 67, 73, 67, 67, 70, 64} Determine: 1. Mean 2. Median 3.…

A:

Q: The following data represent the number of people aged 25 to 64 years covered by health insurance​…

A: Solution Age Number (f) Midpoint (x) f*x x2 f*x2 25-34 27.3 29.5 805.35 870.25 23757.825…

Q: Use the empirical rule for finding the percent of data, which are normally distributed, that lie a.…

A: Empirical rule : 68% area covered within 1 standard deviation of the mean. 95% area covered within 2…

Q: Find the standard deviation for the given data set: 23, 23, 25, 26, 26, 27, 28, 32, 33, 35, 38.…

A: given data, we have to find out the standard deviation for the given data.data set is:23, 23, 25,…

Q: Refer to the incomplete grouped frequency distribution below. Classes (Rand) 8.00 < 12.00 Frequency…

A:

Q: The World Bank Group suggests that a minimum of 6 GB of internet data per month per user is needed…

A:

Q: A normal distribution of scores has the following: mean = 120 standard deviation = 20 What range of…

A: given data normal distribution μ = 120σ = 20 for middle 60%  range = ?

Q: ctrical customers are often told what the average amount of electricity is used for similar homes in…

A: The mean is μ=1650Standard deviation is σ=320z-value at 86% confidence is Zc=1.18x=?

Q: Deforestation along the Sierra Madre mountains have been especially notorious. The average number of…

A: Given that.   X~N( μ , ?)   μ=4373    , ?=610   Z-score =( x - μ )/?

Q: Assume that women have heights that are normally distributed with a mean of 63.6 inches and a…

A:

Q: One of the following measures may take more than one value: Select one: a. Median. b. Mode. c. Mean.…

A: Median, mean and standard deviations take only one value.

Q: For a particular process, the mean value is 1.832 and the standard deviation is 0.021.  Find the…

A:

Q: Find the Absolute Quartile Deviation for the following data. 042, 384, 591, 407, 672, 522, 777, 733,…

A: The first and the third quartile, obtained in excel using "QUANTILE.EXC()", is  Q1 = 401.25 Q3 =…

Q: How high must a 2016 Vehicles gas mileage be to fall in the top 15% of all vehicles? normal mean is…

A: Given information: normal mean is 23.0mpg standard deviation is 4.9mpg

Q: Report the mean (including standard deviation), median, and mode for the following data set of worm…

A: From the provided information,The data values are as follow: 6, 4, 11, 12, 13, 9, 10, 14, 8, 4, 7,…

Q: Normal Distribution. The volume of water in commercially supplied fresh drinking water containers is…

A:

Q: Assuming that the heights of college women are normally distributed with mean 64 inches and standard…

A: Heights of college women are normally distributed :  Mean = 64  Standard deviation = 1.5  Percentage…

Q: The distribution of heights of adult men is approximately normal with mean 69 inches and standard…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…

Q: Given the set of data: (77, X. 75, 79, 79, X, 76, 75, X, 76}. If the unknown data X is the mode and…

A:

Q: iv. Find the average height of the club members. v. Calculate the standard deviation for the…

A: For the given data , We have to calculate average and standard deviation.

Q: A service station owner believes that equal numbers of customers prefer to buy gasoline on every day…

A: It is needed to test the whether the number of customers who prefers to buy gasoline on each day of…

Q: The fuel efficiency of cars currently registered in the Commonwealth of Virginia is normally…

A: X follows a Normal distribution with mean = 24 and S.D = 6 Then z=(x-mean)/SD = (x-24)/6  follows…

Q: what percent of values fall between 5.25 and 8.75 if the mean =7 and standard deviation =1.75

A: Mean=7 Standard deviations=1.75

Q: A baseball team is reviewing their batting statistics. The mean number of hits for the batters on…

A: Given Population mean μ=124,  standard deviations σ=14.5  Let X be the baseball team is reviewing…

Q: what percent of values fall between 5.25 and 8.75 if the mean =5 and standard deviation =1.86

A: Answer: From the given data, Mean (μ) = 5 Standard deviation (σ) = 1.86 X follows normal…

Q: In a population of ages where the mean age is 45 and the standard deviation is 5.25, what are the…

A: Given Mean=45 Standard deviations=5.25