Chapter6-PracticeActivity

Chapter6-PracticeActivity - STA2023 Chapter 6 Practice...

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

View Full Document Right Arrow Icon
1 STA2023 – Chapter 6 Practice Activity 1. Suppose the most recent census reported that ages of all Alachua County residents are normally distributed with an average of 28.1 years and a standard deviation of 2.5 years. To verify the accuracy of the census results, a statistics student collected age data from a random sample of 500 Alachua County residents and found the average age of these 500 people to be 27.8 years, with a standard deviation of 2.3 years. Provide an appropriate symbol for each of the numerical values given in this scenario. 28.1 years: 2.5 years: 500 people: 27.8 years: 2.3 years: 2. The amount of Jen’s monthly phone bill is normally distributed with a mean of $61 and a standard deviation of $12. Use the 68-95-99.7 rule to answer each of the following questions. You should draw a well-labeled Normal curve for each part. A. Approximately what percent of the time is Jen’s phone bill between $49 and $61? B.
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 11/22/2010 for the course STA 2023 taught by Professor Ripol during the Spring '08 term at University of Florida.

Page1 / 2

Chapter6-PracticeActivity - STA2023 Chapter 6 Practice...

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