Mean and Standard Deviation of a Probability Distribution Statistics Random Variables Mean and Standard Deviation of a Probability Distribution Add yours Sorry, we don't have any videos for this topic yet. Let teachers know you need one by requesting it Request a video 5 Help us find a video Log in so we can tell you when a lesson is added. Sign in with Google Sign in with Facebook Questions The mean a person gets to work is 29.7 minutes. If the standard deviation is 6 minutes, within what limits would you expect approx 68% of the times to fall? Assume the distribution is approx bell shaped. Shantelle answered · 2 days ago 1 Answer The average cost per night of a sample of 45 hotel rooms in New York City is $273. The sample standard deviation is $54. What is population mean cost per night of hotel rooms in NYC? 3 days ago 0 Answers In the United States, the average IQ is 100, with a standard deviation of 15. What percentage of the population would you expect to have an IQ lower than 85? What percentage of the population would you expect to have an IQ between 90 and 120? 1 week ago 0 Answers How do you find the standard deviation of 156, 251, 120, 180, 233, 106, 228, 193, 264? 1 week ago 0 Answers On a standard measure of hearing ability the mean is 300 and the standard deviation is 20. What is the raw score for people whose z scores on this test are -4.5? Nallasivam V answered · 1 week ago 1 Answer If you know the weight of a brick within a margin of 0.01 kg, then would it be possible to determine the weight of 10,000 bricks 100 kg? 1 week ago 0 Answers What are the mean and standard deviation of #p(x) = k*1/x^3#, where k is a constant s.t. the max CDF equals one? 1 week ago 0 Answers What is the formula for the standard error? Jeronimo answered · 2 weeks ago 1 Answer For a bell curve with mean 7 and standard deviation 3, how much area is under the curve, above the horizontal? marfre answered · 2 weeks ago 1 Answer Inside a bag are 6 red, 4 orange, 7 yellow, 3 purple and 4 green Skittles. What is the probability of drawing a green Skittle, replacing it, and then drawing another green Skittle? Shwetank Mauria answered · 2 weeks ago 1 Answer For a sample of #n=62#, how do you find the probability of a sample mean being less than 24.1 if #mu=24# and #Ïƒ=1.33#? 3 weeks ago 0 Answers How can I find the standard deviation of 508, 657, 214, 958, 765, 449, 338, and 497 solely using a calculator? 3 weeks ago 0 Answers The final examination grades in an introductory statistics course are normally distributed, with a mean of 4 and a standard deviation of 2. What is the probability of scoring above a 9 on the exam? 3 weeks ago 0 Answers Suppose that four students paid the following amounts for textbooks this semester: 90, 110, 150, 190. Using a sample size of 3, how do you find the mean and standard deviation of the sampling distribution? 3 weeks ago 0 Answers What are the mean and standard deviation of the probability density function given by #p(x)=cotkx^2# for # x in [pi/8,(5pi)/12]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 4 weeks ago 0 Answers What are the mean and standard deviation of the probability density function given by #(p(x))/k=e^(x)/(x-2)# for # x in [0,1]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 4 weeks ago 0 Answers Why do we amplify large and small distances in the standard deviation formula by squaring them and later taking the root? 1 month ago 0 Answers What are the mean and standard deviation of a probability density function given by #Pr(X=k) = (100^ke^-100)/(k!) # for #k in {0,1,2... oo}#? 1 month ago 0 Answers A student received grades of 99, 81, 86, and 81 on math quizzes. How do you find the student's average? Mark D. answered · 1 month ago 1 Answer What are the mean and standard deviation of the probability density function given by #(p(x))/k=x+1-e^(x+1)# for # x in [0,1]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 1 month ago 0 Answers What is the standard deviation of {400,300,325,275,425,375,350}? 1 month ago 0 Answers What are the mean and standard deviation of the probability density function given by #p(x)=k(1-xe^(-x^2) )# for # x in [0,4]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 1 month ago 0 Answers What are the mean and standard deviation of the probability density function given by #(p(x))/k=x^n-x^(n-1)# for # x in [0,1]#, in terms of k and n, with k being a constant such that the cumulative density across the range of x is equal to 1? Ultrilliam answered · 1 month ago 1 Answer How do you calculate the standard deviation of percentages? 1 month ago 0 Answers What is the mean of 24, 36, 48 and 60? hev1 answered · 1 month ago 2 Answers The mean annual cost of car insurance is $939. The standard deviation is $300. What is the standard deviation of x-bar? 1 month ago 0 Answers What are the mean and standard deviation of the probability density function given by #p(x)=seckx^2# for # x in [pi/8,(5pi)/12]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 1 month ago 0 Answers Can you determine a standard deviation from just two or three numbers? VarunStatsHelp answered · 1 month ago 1 Answer What is the relation between standard deviation and accuracy? 1 month ago 0 Answers What is the relation between the standard deviation and the precision of a procedure? 1 month ago 0 Answers What are the mean and standard deviation of the probability density function given by #p(x)=cos^2kx# for # x in [0,pi/4]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 1 month ago 0 Answers Let's say that the mean was 71.3, the standard deviation was 18.7. Does the standard deviation mean that 9.35 + or - from 71.3 will all get the same grade? 1 month ago 0 Answers Can you use a mean and standard deviation to calculate the probability of an event? If so, how? Nimo N. answered · 1 month ago 1 Answer The energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. How do you find the probability that the energy consumption level is between 1100 kWh and 1221 kWh? marfre answered · 2 months ago 1 Answer What are the mean and standard deviation of the probability density function given by #(p(x))/k=e^(x^2) # for # x in [0,7]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 2 months ago 0 Answers The mean temperature of humans is known to be 36.8Â°C. The standard deviation of human temperatures is 0.4Â°C. How do you find the probability that the mean temperature of a sample of 131 people will be greater than 36.9Â°C? VarunStatsHelp answered · 2 months ago 1 Answer What are the mean and standard deviation of the probability density function given by #p(x)=sec(-k(x-pi))# for # x in [pi/8,(5pi)/12]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 2 months ago 0 Answers How do you calculate a percentile with a mean and standard deviation? 2 months ago 0 Answers For a probability distribution, the mean mean is 66 and standard deviation is 21.25735. How many standard deviations away from the mean is a mark of 84? 2 months ago 0 Answers What is a perfect bell curve? 2 months ago 0 Answers Is the standard deviation a good measure of precision? 2 months ago 0 Answers What are the mean and standard deviation of the probability density function given by #(p(x))/k=sqrt(x+3)# for # x in [2,9]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 2 months ago 0 Answers How do I calculate the standard error when I do not know the standard deviation? 2 months ago 0 Answers What are the mean and standard deviation of a probability density function given by #Pr(X=k) = (3^ke^-3)/(k!) # for #k in {0,1,2... oo}#? VarunStatsHelp answered · 2 months ago 1 Answer Why are there 2 formulas for standard deviation? sjc answered · 2 months ago 1 Answer A test consists of 910 true or false questions. If the student guesses on each question, what is the standard deviation of the number of correct answers? VarunStatsHelp answered · 2 months ago 1 Answer What is need the mean of 18, 24, 67, 53, 36, 64, 124, 91, 101, 106, 102, 127? What are 2 standard deviations above and below the mean? VarunStatsHelp answered · 2 months ago 1 Answer What are the mean and standard deviation of the probability density function given by #(p(x))/k=x^3-8x# for # x in [0,2]#, in terms of k, with k being a constant such that the cumulative density across the range of x is equal to 1? 2 months ago 0 Answers What are the mean and standard deviation of a binomial probability distribution with #n=69 # and #p=5/23 #? VarunStatsHelp answered · 2 months ago 1 Answer What benefits are there for using standard deviation, over the absolute deviation? 2 months ago 0 Answers more Ask a question Answer questions Random Variables View all chapters 1 Probability Distribution 2 Mean and Standard Deviation of a Probability Distribution 3 Law of Large Numbers 4 Addition Rules for Variances Prev Next