Hw7_skeleton

8.2

• 1. .44
• 2. Sample proportion; x/n.
• 3. False.
• 4. True.
• 5. when np(1-p) is greater or equal to 10.
• 6. As the sample size increases the standard decation of p decreases. If the sample size is increased by a factor of 4 then the standard deviation reduces to half
• 7. (0.4, square root of 0.4x0.6/500).
• 8. 0.0264.
• 1. sampleing distribution of p sigma= square root of 0.35x.65/1000

  2. 0.0040

  3. 0.0233

• 1. square root of .42x.58/1460

  2. 0.0102

  3. 0.0606

• 1. random sample size 500 Americans = >5% of the population

  2. 0.323

  3. 0.33

  4. 0.08378