The life of a Radio Shack record player is normallydistributed with a mean of 4 years and a standarddeviation of 1.1 years. Radio Shack guarantees itsrecord players for 2 years.(a) Find the probability that a record player willlast less than 2 years?%(b) Find the probability that a record player willlast more than 4 years?Submit Question

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Answered: The life of a Radio Shack record player…

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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Show complete and clear (if it is hand writing) solution and also provide given and illustration if possible. Thank you. explain your answer
High school students across the nation compete in a financial capability challenge each year by taking a National Financial Capability Challenge Exam. Students who score in the top 13 percent are recognized publicly for their achievement by the Department of the Treasury. Assuming a normal distribution, how many standard deviations above the mean does a student have to score to be publicly recognized? (Round your answer to 2 decimal places.)
correct answer please . I
Lost-time accidents occur in a company at a mean rate of 0.3 per day. Using the data above, what is the probability that the number of lost-time accidents occurring over a period of 7 days will be more than 3?
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?
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?
IQ scores have a mean of µ=100 in the general population, and have a standard deviation of σ=15. You take a random sample of n=9 people. What is the probability that your sample mean will be M=95 or less?
An electrical firm manufactures incandescent light bulbs that have a length of life (in hours) that is normally distributed. If the mean and standard deviation length of life of all lightbulbs produced are 1250 hours and 300 hours respectively, find the probability that a randomly selected bulb will last less than 1100 hours. Do NOT round off until you arrive at the FINAL ANSWER. Round off final answer to 3 decimal places example: (1.234)
Durations of clinical research studies awarded by a particular federal agency are assumed to follow a normal distribution, with a mean of 24 months and a standard deviation of 2.5 months.Find the probability that a study is awarded with a duration between 15 and 25 months.
Round z-score to the nearest hundredth and then find the required A values using the table. The amount of time customers spend waiting in line at a bank normally distributed, with a mean of 3.0 minutes and a standard deviation of 7.5 minute. Find the probability that the time a customer spends waiting is as follows. (A) Less than 3.5 minutes and (B) less than 1.5 minutes.
high school students across the nation compete in a financial capability challenge each year by taking a National Financial Capability Challenge Exam. Students who score in the top 76 percent are recognized publicly for their achievement by the Department of the Treasury Assuming a normal distribution, how many standard deviations above the mean does a student have to score to be pubicly reconized? (round your answer to 2 decimal places) standard deviation
z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?

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