HW8_skeleton

9.1

• 1. point estimate
• 2. level of confidence, (1-a)100
• 3. False
• 4. critical values
• 5. increases
• 6. decreases
• 7. .05
• 8. .005
• 9. .01
• 10. .04
• 11. p hat=.226, E=.024, x=.225*1200=270
• 12. p hat=.0625 E=.0115 x=105
• 15. (.146,.254)
• 16. (.320,.480)
• 21. C
• 1. .181

  2. 341.839 is greater than or equal to 10, this validates the terms

  3. (.168,.194)

  4. We are 90% confident that the population proportion of adult americans 18 and older who have donated blood in the past 2 years is between .168 and .194

• 1. .430

  2. 282.600 is greater than or equal to 10 so this validates the terms

  3. (.401,.459)

  4. We are 95% confident that the population proportion of workers and retirees of the US who are 25 years and older who have less than 10,000 in their savings accounts is between .401 and .459