The average student loan debt for college graduates is $25,000. Suppose that that distribution is normaland that the standard deviation is $13,750. Let X = the student loan debt of a randomly selected collegegraduate. Round all probabilities to 4 decimal places and all dollar answers to the nearest dollar.a. What is the distribution of X? X - N(b Find the probability that the college graduate has between $16,850 and $33,800 in student loan debt.c. The middle 10% of college graduates' loan debt lies between what two numbers?Low: $High: $

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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2. Fill in the blanks: A standardized variable always has a mean of and a standard deviation of The probability is 0.667 that the favorite in a horse race will finish in the money (first, second, or third place). In 500 horse races, roughly how many times will the favorite finish in the money?
On typical cold December weekends, 1912 customers visit a tree farm to purchase a Christmas tree. The probability that a customer is wearing a hat with a pom pom is 8%. Find the mean number for this distribution. (Round answer to one decimal place.) Find the standard deviation for this distribution. (Round answer to two decimal places.) Use the range rule of thumb to find the range of the usual number people wearing a hat with a pom pom on a given weekend. Enter answer as an interval using square-brackets only with whole numbers. usual values = > Next Question P Type here to search
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c. mean is 1 and the standard deviation is 0. O d. mean and the standard deviation can have any value. QUESTION 2 Which of the following is a characteristic of the standard normal probability distribution? a. The mean, median, and the mode are not equal b. The distribution is not symmetrical c. The standard deviation must be 0 d. The standard deviation must be 1 Click Save and Submit to save and submit. Click Save All Answers to save all answers.
The owner of a convenience store has determined that their daily revenue has mean $7,200 and standard deviation $1,200. A simple random sample of the next 30 days is taken and daily revenue is recorded. What is the probability that the mean daily revenue for the next 30 days will be between $7,000 and $7,500? Round answer to 4 decimal places
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A professor knows that her statistics students' final exam scores have a mean of 79 and a standard deviation of 12.4. In his class, an "A" is any exam score of 90 or higher. This quarter she has 25 students in her class. What is the probability that 7 students or more will score an "A" on the final exam?
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Private nonprofit four-year colleges charge, on average, $27,088 per year in tuition and fees. The standard deviation is $7,205. Assume the distribution is normal. Let X be the cost for a randomly selected college. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( b. Find the probability that a randomly selected Private nonprofit four-year college will cost less than 26,156 per year. c. Find the 60th percentile for this distribution. S (Round to the nearest dollar.)
Asset A will generate a 20% return with probability 0.25; a 15% return with probability 0.50; and a -15% return with probability 0.25. The standard deviation of the return on Asset A is %. Write your answer as a percentage, rounded to 2 decimal places. Example: if the answer is 10.3478%, then write "10.35". Do not type the % sign in your answer.
The average student loan debt for college graduates is $25,600. Suppose that that distribution is normal and that the standard deviation is $11,400. Let X = the student loan debt of a randomly selected college graduate. Round all probabilities to 4 decimal places and all dollar answers to the nearest dollar.b Find the probability that the college graduate has between $13,550 and $33,450 in student loan debt. c. The middle 10% of college graduates' loan debt lies between what two numbers? Low: $ High: $

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