QUESTION 7The weekly salaries of public health workers in one state are normally distributed, with a mean of $490 and a standard deviation of $45. What isthe probability that a randomly selected worker earns more than $525.10 a week?O0.2823O 0.7823O 0.2177O 0.10030.4354QUESTION 8Chck Save and Submit to save and submit. Chck Save All Answers to save all answers.Save All Aroff an

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Answered: QUESTION 7 The weekly salaries of…

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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Time to Complete Final Exam. The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. Assume that 20% of students did not complete the exam. What was the exam duration?
Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results are given in the frequency distribution: Aptitude Score 0 1 2 3 4 5 Frequency 1 6 4 1 5 2 Calculate the sample standard deviation of this data. Answer using two decimal places.
Citizens use an average of 650 pounds of paper a year. Suppose that the distribution is normal with a population standard deviation of 153.5 pounds. Suppose you take a random sample of 25 Citizens. What is the probability that the mean pounds of paper used in a year are between 500 and 700 pounds
Joey and Dee Dee bowled five games at the Rock 'n' Bowl Lanes. Their scores are given in the following table. Joey 143 170 219 157 146 Dee Dee 183 166 188 143 160 (a) Find the mean score of each bowler. (Round the answer to one decimal place.) Joey X = Dee Dee x = (b) Find the standard deviation of each bowler's scores. (Round the answer to one decimal place.) Joey S = Dee Dee s =
A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 35,000 miles and a standard deviation of 2100 miles. He wants to give a guarantee for free replacement of tires that don't wear well. How should he word his guarantee if he is willing to replace approximately 10% of the tires? Click to view page 1 of the table. Click to view page 2 of the table. Tires that wear out by miles will be replaced free of charge. (Round to the nearest mile as needed.)
Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?
Multiple questions
The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the standard deviation is σ = 4 years, what is the probability of a person living to at least 92 years of age?
Repair Cost for Microwave Ovens The average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs are normally distributed. Find the probability that the mean of the repair bills will be greater than $70.
Lesson Plan Revi..pdf MacBook Pro 4. A farmer has a flock of turkeys with weights that are normally distributed with a mean of 15.3 pounds and a standard deviation of 2.3 pounds. If one turkey is selected at random, wha weight is less than 17.0 pounds? is the probability that its
C, D, E, F
For a specific year. Americans spent an average of $52 for ice cream. The amount spent is normally distributed and the standard deviation is $7.50. Find the probability that a randomly American spent more than $47 per year on ice cream. Show work. __________ If 1200 Americans were randomly selected, about how many would you expect to have spent less than $47 per year on ice cream? Show your work. ________

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