Bus waiting time is uniformly distributed with the shortest and the longest waiting times being 14.71 and 32.87 minutes respectively. What is the standard deviation of the average waiting time of 94 passenger?

Q: A race director is preparing for an upcoming marathon and estimates that the mean time to finish is…

A: Given information- Population mean, µ = 312 minutes Population standard deviation, σ = 70 minutes We…

Q: how do you find the standard deviation of 7.1 , 11.6, 8.1, and 13.4 ?

A: The standard deviation of a  data distribution tell us how deviated are the data points with respect…

Q: The We Go Farther Tire Company advertises a tire that lasts for 80,000 miles. The mileage for the…

A:

Q: Use Chebyshev's theorem to solve the problem. Find the least possible fraction of numbers in a data…

A: Consider that a random variable X has expected value μ and standard deviation, σ. Now, according to…

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Let X represents the lengths of the steel rods Mean (X)=98.3 Standard deviation (X)=2.4 Therefore,…

Q: The mean annual income for people in a certain city (in thousands of dollars) is 42, with a standard…

A: The formula for mean of the Z-score is, Z=x¯-μσn Here n is the sample size, μ is the population mean…

Q: Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve speeds can…

A: M=Mean=112, sd=standard deviations=5

Q: the data set has a size 50, how many observations lie within 2 standard deviations of the mean

A: From the provided information, Sample size (n) = 50 The observations lie within 2 standard…

Q: A drug was tested on one hundred and eighty patients of which fifty patients respond to the…

A: Solution: Let X be the number of patients respond to the drug and n be the sample number of…

Q: Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of…

A: Given that   x̄ = 14 , μ = 16 , ? = 7 , n = 4

Q: The average life of a car tire is 50,000 miles.  The standard deviation is 2,000 miles   What…

A: Normal distribution, also known as the Gaussian distribution, is a probability distribution that is…

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Normal distribution

Q: A radio station claims that the amount of advertising each hour has a mean of 17 minutes and a…

A:

Q: A maths class has 100 members. If there is a 15% absentee rate per class meeting , find the standard…

A:

Q: Steel rods are manufactured with a mean length of 28 centimeters. because because of variability in…

A: Answer:- Given, Mean, µ = 28  Standard deviation, σ = 0.06  Let, X = Length of the steel rods.  So,…

Q: Seattle, Washington, averages 34 inches of annual precipitation. Assuming that the distribution of…

A: Given information Mean µ = 34 Standard deviation σ = 6.5 inches Absolute z score value of 2 or more…

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: Each of the variables displayed in the histograms below has a mean of 14.5, a range of 8, and 59…

A:

Q: There are eight patients waiting in a doctor's waiting room.  They have been waiting for 9 minutes,…

A: Let us denote the waiting times as X. X 9 2 5 4 12 7 8 11 Consider, the mean of X is, X¯=∑Xn…

Q: The amount of​ Jen's monthly phone bill is normally distributed with a mean of $ 66 and a standard…

A:

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

A: It is given that the mean is 600 and the standard deviation is 100.

Q: The strength of the welds in a new manufacturing process is measured by the amount of weight needed…

A: Using the Excel formula to find the z – critical value as follows:

Q: A manufacturer of phone batteries determines that the average length of talk time for one of its…

A: Mean=470, standard deviations σ=32

Q: A community college Math instructor feels that the average age of community college students…

A: Consider that μ is the population mean age of community college students.

Q: Assume that the square footage of a residential house in the US is normally distributed with a…

A: Assume that the square footage of a residential house in the US is normally distributed

Q: The weights of baby tortoises are approximately normally distributed with a mean of 25.6 ounces and…

A:

Q: The mean of 7 consecutive integers is 10. What is the standard deviation?

A: