HW6_skeleton

7.2

• 1. Standard Normal Distribution
• 2. The same as the left, .50
• 3. .3085
• 4. 0.4207
• 1. .0071

  2. .3336

  3. .9115

  4. .9998

• 1. .9987

  2. .9441

  3. .0375

  4. .0009

• 15. .67
• 17. 2.57, -.257
• 18. 1.88, -1.88
• 23. .9838

shadenorm(mu=50, sig=7, above = 35,col = "blue",dens = 150)

• 24. .0162

shadenorm(mu=50, sig=7, above = 65,col = "blue",dens = 150)

• 25. .2357

shadenorm(mu=50, sig=7, below = 45,col = "blue",dens = 150)

• 1. .8657

  2. .0132

  3. .7004 have more than 1200 chips

  4. .1228 have fewer than 1125 chips

  5. 96th percentile

  6. 4th percentile

8.1

• 1. The Sampling Distribution
• 2. mu, σ/√n
• 3. Standard Error of the Mean
• 4. True
• 5. False, the sample size must be less than 30
• 6. False
• 7. X bar ~ N= (30, 2.5298)
• 8. The population does not need to be normally distributed, because the sample size is grater than 30, X bar ~ N= (.6324)
• 9. mu= 80, σ= 2
• 10. mu= 64, σ= 3
• 1. around normal, mu = 80, σ = 2

  2. .0668

  3. .0179

  4. .7969

• 1. 0.3520

  2. normal distribution, mu = 266, σ = 3.578

  3. .0465

  4. .00040

  5. it would be unlikely that the sample came from a population with a mean of 266

  6. .9844