What is the expected value and variance of flight time? Delta Airlines quotes a flight time of 2 hours, 5 minutes for its flightsfrom Cincinnati to Tampa. Suppose we believe that actual flight timesare uniformly distributed between 2 hours and 2 hours, 20 minutes.Answer questions 11-13.

Given that x~u (120 ,140 ) Find Expected value =? Variance =?

Answered: What is the expected value and variance…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Provide an interpretation of the mean (or expected value) of a discrete random variable. Give an example in real life how this concept is used.
A player takes 10 shots on a target and has probability 0.2 of hitting the target in each shot, independent of all other shots. Let X be the number of hits. Calculate and plot the PMF of X. What is the probability of scoring no hits? What is the probability of scoring more hits than misses? Find the expectation and the variance of X.
Explain kurtosis of the distribution?
Suppose you would like to keep a test tube at 48F (exactly), but your refrigeration unit exhibits some random fluctuations, so that the difference between the temperature at which you set the thermostat and the true temperature is distributed normally with mean 0 and variance 1.96. What is the highest you can set the thermostat and be 95% sure that the true temperature is no more than 48F?
ANOVA looks at both between subjects and within subjects variance. Looking at variance in one condition (for example, everyone who drank espresso shots) is: which one below? Within subjects variance Internal variance All variance Between subjects variance
You run a house flipping business where you buy thousands of houses across the country, hire contractors to fix them up, and try to sell them. For any given house, you figure there is a 50%/50% chance of gaining 60% or losing 40%. This means your expected return per house is 0.5x0.60+0.5x(-0.40) = 0.10 = 10%. The variance per house is 0.5x(0.60-0.10)2 + 0.5x(-0.40-0.10)2 = 0.25. If the covariance between houses is 0.10, what is the variance of your portfolio of thousands of houses
4
Calculate the expected value, the variance, and standard deviation where X is the number of tails that come up when a coin is tossed three times
1. Describe the key features of the normal curve and explain why the normal curve in real-life distributions nevermatches the model perfectly.
Growth of bacteria culture after one week, represented by its size, is known to follow lognormal distribution with mean of 2 and variance of 0.2. What is the upper and lower quartile of the size of the culture after one week?
A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 14 years with a variance of 16. If the claim is true, in a sample of 40 wall clocks, what is the probability that the mean clock life would differ from the population mean by greater than 0.4 years? Round your answer to four decimal places. don't forget to round
Do question 2

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