IDS301-Practice for Final

IDS301-Practice for - IDS 301 Part 1 Chapters 3 through 9 1 You receive 18 pieces of mail a week The amount of mail you receive each week is

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
IDS 301 Part 1 Chapters 3 through 9 1. You receive 18 pieces of mail a week. The amount of mail you receive each week is independent of each other and does not influence how much you may receive the next week. There is no mail on Sundays. What is the expected number of pieces of mail you will get in a day? What is the probability that you receive more than 1 piece of mail in a given day? 2. The unemployment rate in San Diego is 6.2%. What is the probability that you select 100 people and at most 3 are unemployed? If you pick 100 people, what is the expected number of people that will be unemployed? What is the probability that at least 2 of the 100 people are unemployed? 3. The average number of minutes a person uses their cell phone is 1,548 minutes per month with a standard deviation of 378 minutes. If you randomly select 50 people, what is the probability that they use their phone for more than 1,650 minutes? What is the probability that they use their phone less than 1575 minutes per month? What is the probability that they use their phone less than 1500 minutes per month? What is the probability that they use their phone between 1400 minutes and 1600 minutes per month? If the population was normally distributed, what is the probability that you select 1 person and they use their cell phone for more than 2,000 minutes? If the population was normally distributed, what is the probability that you select 1 person and they use their cell phone for less than 750 minutes? If the population was normally distributed, what is the probability that you select 1 person and they use their cell phone between 1200 and 2300 minutes per month? Where does the top 3% of users start? 4. The Cable Guy arrives for his appointment in a five hour window. His arrival times are uniformly distributed. If you have an appointment with the cable guy and his 5 hour window is from 8
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/18/2008 for the course IDS 301 taught by Professor Shaul during the Spring '08 term at San Diego State.

Page1 / 4

IDS301-Practice for - IDS 301 Part 1 Chapters 3 through 9 1 You receive 18 pieces of mail a week The amount of mail you receive each week is

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online