13. The life span of a particular species of turtle is normally distributed with a mean of 180 yearsand a standard deviation of 40 years. Use the z-score tables to answer the following questions:a) What is the probability that a randomly chosen turtle will live for less than 150 years?*b) What is the probability that a randomly chosen turtle will live for more than 200 years? |4

13.The given mean is 180 and the standard deviation is 40.

Answered: 13. The life span of a particular…

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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7. Use R: Suppose the yearly income of people in Minnesota is normally distributed with mean 45,700 and standard deviation 2830. Find the probability that 10 randomly selected people have mean (Xbar) income between 44000 and 48000.
2. The number of pages in a PDF document you create has is randomly distributed between 5 and 9 pages, where all values are equally likely. What are the mean and standard deviation of the number of pages in the document2
Suppose the heights of students in a class follows normal distribution. The mean is 66 inches and the standard deviation is 5 What is the probability that a randomly selected student height is above 69 inches? What is the probability that the height will fall in between 45-54 inches? Which of the following intermediate step is involved in finding probability that a randomly selected student height is more than 70 inches?
1. Assume that IQ are normally distributed with a mean of 100 and standarddeviation of 18. For a sample of 15 adults, find the probability that their mean IQscore will be greater than 94?
Scores on a standardized exam for 2nd graders are approximately normally distributed with a mean of 72 and a standard deviation of 6. a) b) c)
A researcher wants to know if there is a difference between the mean amount of sleep that people get for various types of employment status. The table below shows data that was collected from a survey. Full Time Worker Part Time Worker Unemployed 6 6 7 5 6 7 8 9 9 7 6 8 8 8 8 8 8 8 6 6 8 8 7 6 9 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of α=0.01α=0.01.H0: μ1=μ2=μ3H0: μ1=μ2=μ3H1:H1: At least two of the means differ from each other. For this study, we should use Select an answer 2-PropZTest 2-PropZInt 1-PropZInt 2-SampTInt 1-PropZTest T-Test χ²-Test ANOVA χ²GOF-Test TInterval 2-SampTTest The test-statistic for this data = (Please show your answer to 3 decimal places.) The p-value for this sample = (Please show your answer to 4 decimal places.) The p-value is Select an answer less than (or equal to) alpha greater…
38)
Suppose the mean income of firms in the industry for a year is 2525 million dollars with a standard deviation of 77 million dollars. If incomes for the industry are distributed normally, what is the probability that a randomly selected firm will earn less than 4040 million dollars? Round your answer to four decimal places.
Q3 i) The average number of acres of land cultivated with food grains is normally distributed with mean 4,300 acres per year, and standard deviation of 750 acres. What is the probability that between 2,500 and 4,200 acres will be cultivated in any given year? What number of cultivated acres corresponds to the 38th percentile?
1. Assume that IQ are normally distributed with a mean of 100 and standard deviation of 15. For a sample of 25 adults, find the probability that their mean IQ score will be greater than 90?

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