On average, indoor cats live to 12 years old with a standard deviation of 2.4 years. Suppose that thedistribution is normal. Let X = the age at death of a randomly selected indoor cat. Round answers to 4decimal places where possible.a. What is the distribution of X? X ~ N(b. Find the probability that an indoor cat dies when it is between 9.5 and 10.8 years old.c. The middle 20% of indoor cats' age of death lies between what two numbers?Low:yearsHigh:years

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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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Provide an appropriate response. Use the Standard Normal Table to find the probability. IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. An individual's IQ score is found to be 90. Find the z-score corresponding to this value. OA. -1.33 OB. 1.33 OC. 0.67 O D. -0.67 C
The SAT scores for students are normally distributed with a mean of 1150 and a standard deviation of 245. What is the probability that a sample of 30 students will have an average score between 1050 and 1120? Round your answer to 3 decimal places. Group of answer choices 0.110 0.565 0.761 0.239 0.890
Not everyone pays the same price for the same model of a car. The figure illustrates a normal distribution for the prices paid for a particular model of a new car. The mean is $ 18 comma 000$18,000 and the standard deviation is $ 2000 Use the 68 - 95-99.7 68-95-99.7 Rule to find the percentage of buyers who paid more than $ 20 comma 000$20,000.
Find SAT Quartiles. SAT scores are reported on a scale from 600 to 2400. The mean is 1498 and the standard deviation is 316. The quartiles of any distribution are the values with cumulative proportions 0.25, and 0.75. What are the quartiles of the distribution of SAT scores?
identify the sample space of the probability experiment and determine the number of outcomes in the sample space. Randomly choosing a number from the even numbers between 10 and 20, inclusive. The sample space is _____. * use a comma to separate answers as needed. Use ascending order.
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Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 240 feet and a standard deviation of 48 feet. Let X = distance in feet for a fly ball. If one fly ball is randomly chosen from this distribution, what is the probability that this ball traveled fewer than 186 feet? (Round your answer to four decimal places.) ch6#4
A subway train arrives every eight minutes during rush hour. We are interested in the length of time a commuter must wait for a train to arrive. The time follows a uniform distribution. a. Find the mean, μ = b. Find the standard deviation, σ = Round to the nearest tenth.
In a study, 25,000 adults were randomly surveyed as to the number of grandchildren they have, X. The probability distribution is given below. Find the mean and the standard deviation of the probability distribution using a TI-83, TI-83 Plus, or TI-84 graphing calculator. Round the mean to one decimal place and the standard deviation to two decimal places. x P(x) 0 0.01 1 0.02 2 0.02 3 0.24 4 0.35 5 0.20 6 0.07 7 0.05 8 0.02 9 0.01 10 0.01
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