The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 39 and a standard deviation of 5. Using the empirical rule (as presented in the book), what is the approximate percentage of lightbulb replacement requests numbering between 39 and 54?

Q: number 4

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

Q: a certain presidential election, Alaska's 40 election districts averaged 1,953.8 votes per district…

A: given data, bell- shaped distribution μ=1593.8σ=572.2x= number of votes for this candidate for an…

Q: According to one study, the average hours of sleep on a weeknight for men was 6.9 hours with a…

A:

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 that the weights of candy bars vary according to a normal distribution, with mean of 62…

A: The question is about normal dist. Given : The mean weights of candy bars ( μ ) = 62 g The std.…

Q: udnury's bowling ball factory in llinois , in pounds, of 9 of the bowling balls produced that day…

A: See the handwritten solution

Q: Assume that songs the lengths of songs released in 2020 are normally distributed with a mean of 210…

A: (a) Determine the percentage of songs that were less than 150 seconds.…

Q: The ages of the members of a popular ski club is normally distributed with a mean of 46 years and a…

A: Given that the ages of the members of a popular ski club is normally distributed with a mean of 46…

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 successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

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: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: a. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: The weights of tablets are normally distributed with mean 254 mg and standard deviation 4 mg.  What…

A:

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

A:

Q: The weights of tablets are normally distributed with mean 254 mg and standard deviation 4 mg.  What…

A: We have given , Mean(u) = 254 mg. Standard deviation (sigma) = 4 mg. We have to find  What…

Q: The cruising altitudes for the fleet of one commercial airliner are normally distributed with a mean…

A: It is given that the mean is 34,950 and the standard deviation is 1,800.

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

Q: Salaries for Macdonald's workers are normally distributed with a mean of $30,000 and a standard…

A: Given: μ=30000 and σ=5000. From the given information:PZ<z=95%⇒PZ<z=0.95

Q: Consider the variable, type of birth control practiced (e.g., an IUD, condoms, none, etc). Which…

A:

Q: Using a spectrophotometric analytical technique, the glucose concentrations in a patient with mildly…

A: Given that  The data are 16.67, 16.66, 16.64, 16.30, 16.31, 16.70

Q: percent of men meeting these height requirements.

A: Assume that the heights of American men are normally distributed with a mean of 69.0 inches and a…

Q: Saara, a tuck-shop operator in Okuryangava, recorded her weekly income and the number of hours…

A: Correlation coefficient is given by, r=cov(x,y)/sd(x)*sd(y) Where cov(x,y)= E(xy)-E(x)*E(y) E(xy)=…

Q: what is the value of the standard deviation of the weekly earnings of the bus drivers?

A: Let X be the random variable for the weekly earnings of bus drivers.Given that,Population mean

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: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: The amount of Jen's monthly phone bill is Normally distributed with a mean of $ 76 and a standard…

A: Answer: Using the given data, Let X: Jen's monthly phone bill amount X is normally distributed with…

Q: The playing life of a Sunshine radio has a Normal distribution with a mean of 600 hours and a…

A: The playing life of a radio is normally distributed with mean 600 hours and standard deviation of…

Q: Entrance exam scores at Cititon University are normally distributed with a mean of 310 and a…

A:

Q: A. What percentage of students in the sample had a GPA above 3.39? B. Sketch a box plot for this…

A: A) The third quartile, represented as Q3, is the number such that 75% of the observations are less…

Q: For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200…

A: given data μ = 1200σ = 120normal distribution

Q: Suppose the heights of women at a college are approximately Normally distributed with a mean of 65…

A: The objective of this question is to find the height that corresponds to the 40th percentile in a…

Q: let (n)=1 be a sequence of independent random variables such that Vn, X₂ ~ u([1,1]). show that Xn is…

A: To show that the sequence x1+…+xnn is almost surely convergent, we need to demonstrate that it…

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

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

Q: To assess the air quality in a surgical suite, the presence of colony-forming spores per cubic meter…

A: {12,24,30}

Q: A study reported on essential organic molecules and a Normal model can be used to describe these…

A: As per our guidelines we are suppose to answer three sub parts. Given,mean(μ)=194standard…

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 63…

A: Solution: Let X be the speed of a vehicle along a stretch of highway. From the given information, X…

Q: A report states that 45% of American adults were obese. In this report, adults were considered to be…

A: Given Data: Population=301 million=301,000,000   Percentage of adults=0.71   Percentage of adults…

Q: The incomes of math tutors in a tutoring center of a university are normally distributed with a mean…

A: Given,mean(μ)=$1100standard deviation(σ)=$150