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A random variable X follows a uniform distribution with the following parameters: Minimum value a is 2 and maximum value bis 4. What is the standard deviation of this random variable? 0.013 0.333 0.577 1.155 SUBMIT
To raise workplace morale, a company decides to have a contest. They get a medium-sized, unusually shaped glass container and fill it with water; the contest is to guess the number of ounces of water in the container. The winner will receive an assortment of wines and cheeses. The distribution of errors (i.e., how far away each person's guess is from the correct answer) follows a standard normal distribution (i.e., a normal distribution with mean O and variance 1). What is the probability that a randomly chosen person's guess is more than 2 ounces away from the correct answer? 0.023 0.046 0.954 0.977
The random variable Z follows a standard normal distribution; that is, it is normal with mean 0 and standard deviation 1. Find P(Z < 1). 0.691 0.841 0.933 0.977
The weight of golden hamsters follows a normal distribution with a mean weight of 4.3 ounces and a standard deviation of 0.25. What is the probability that a randomly chosen hamster weighs less than 4.4 ounces? 0.655 0.788 0.885 0.945 SUBMIT
The weight of 3-month-old Bullmastiffs follows approximately a normal distribution with a mean of 120 pounds and a variance of 25 pounds squared. If your 3-month-old Bullmastiff is 125 pounds, how many standard deviations above or below the mean is your pet (i.e., find the Z-score)? -1 0 1 1.5
The amount of money that a car insurance company pays out in a given week on single-car accidents follows approximately a normal distribution with mean $45,000 and a standard deviation of $10,000. What is the probability that the insurance company will have to pay out more than $50,000 in a given week? 0.309 0.499 0.691 0.711
The amount of money that a car insurance company pays out in a given week on single-car accidents follows approximately a normal distribution with mean $45,000 and a standard deviation of $10,000. What is the 90th percentile of the amount the insurance company will need to pay out in a given week rounded to the nearest dollar? $32,184 $53,416 $57,816 $61,449
The distribution of NBA scores follows approximately a normal distribution with a mean of 102 and a variance of 81. What is the probability that a team from a randomly chosen game will score between 102 and 111 points in a given game? 0.159 0.341 0.500 0.841
The distribution of NBA scores follows approximately a normal distribution with a mean of 102 and a variance of 81. What is the 90th percentile of NBA scores? 127.56 129.33 113.53 140.94