Researchers at the University of Pennsylvania School of Medicine have determined that children under 2 years old who sleep with the lights on have a 32% chance of becoming myopic before they are 16. Children who sleep in darkness have a 20% probability of becoming myopic. A survey indicates that 20% of children under 2 sleep with some light on. Find the probability that a random child under 2 will become myopic before reaching 16 years old.

Researchers at the University of Pennsylvania School of Medicine have determined that children under 2 years old who sleep with the lights on have a 32% chance of becoming myopic before they are 16. Children who sleep in darkness have a 20% probability of becoming myopic. A survey indicates that 20% of children under 2 sleep with some light on. Find the probability that a random child under 2 will become myopic before reaching 16 years old.

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...

See similar textbooks

Similar questions

Apparently, depression significantly increases the risk of developing dementia later in lift (BBC News, July 6, 2010). In a recent study it was reported that 22% of those who had depression went on to develop dementia, compared to only 17% of those who did not have depression. Suppose 10% of all people suffer from depression. What is the probability of a person developing dementia? If a person has developed dementia, what is the probability that the person suffered from depression earlier in life?
A trainee pilot has a 0.7 chance of passing the written exam for a private pilot's license. Calculate the likelihood that the student will pass the exam before the fifth attempt.
Please read the passage on Antibiotics in Infancy and then answer the questions carefully to get the correct answers.
What is the probability that a driver who was released had actually been drinking?
Set up a tree diagram labelled with events and probabilities (conditional and final joint probabilities) on all branches to correctly illustrate Problem 5 of the Conditional Probability WebWorks set (each student will have different numbers to work with). Show how to use the tree diagram with the appropriate probabilities to get your solution.
A recent study reported that the prevalence of hyperlipidemia (defined as total cholesterol over 200) is 35% in children 2-6 years of age. If 10 children are analyzed, What is the probability that five are hyperlipidemic?
Radio frequency identification (RFID) is an electronic scanning technology that can be used to identify items in a number of ways. One advantage of RFID is that it can eliminate the need to manually count inventory, which can help improve inventory management. The technology is not infallible, however, and sometimes errors occur when items are scanned. The probability that a scanning error occurs is 0.0069. 1. Find the probability that the number of items scanned incorrectly is between 16 and 20 , inclusive, from the next 5100 items scanned. *Kindly explain the procedure in Excel for this* A) The probability is (Round to four decimal places as needed.) 2. Find the expected number of items incorrectly from the next 5100 items B) The probability is (Round to four decimal places as needed.)
Data from a large national study reports that 10% of pregnant women deliver prematurely. A local obstetrician is seeing 16 pregnant women in his next clinic session. What is the probability that none will deliver prematurely? What is the probability that fewer than 3 will deliver prematurely? What is the probability that none will deliver prematurely if in fact the true percentage who deliver prematurely is 5.5%? Interpret findings compared to part a. If the true percentage is 10% and this obstetrician has 146 pregnant women under his care, how many would be expected to deliver prematurely?
According to TMUSS Quarterly (Totally Made-Up Sports Statistics) April 2017, the probability that the Tampa Bay Buccaneers will score a touchdown on their opening drive is 0.26. The probability that their defense will have 3 or more sacks in the game is 0.15. The probability that the Bucs will both score a touchdown on their opening drive and have 3 or more sacks in the game is 0.06. What is the probability that they will either score a touchdown on the opening drive or have 3 or more sacks in the game?
It is reported that 54% of internet users have a wireless connection to the internet via laptop cell phone game console or other mobile devices.of these wireless users 25% of use twitter to share updates of themselves. what is the probability that a internet user has a wireless connection and uses twitter
help
Based on observation 85% of the population of adult males wash their hands in a public restroom. In a survey of 523 adult males, 518 reported they washed their hands when using a public restroom. Find the probability that among 523 randomly selected adult males 518 or more wash their hands in a public. restroom. Does it appear that all the people who claimed they washed their hands were telling the truth?