1. x

    P(X=x)

    0

    0.72

    1

    0.26

    2

    0.02

  2. E(X)=0.30

  3. Var(X)=0.25

  4. x

      F(x)

    <0

    0

    0<=x<1

    0.72

    1<=x<2

    0.98

    >=2

    1

  1. 254300000

  1. 2119000

  1. C(10,0)=1

C(10,1)=10

C(10,2)= 45

C(10,3)=120

C(10,4)=210

C(10,5)=252

C(10,6)=210

C(10,7)=120

C(10,8)= 45

C(10,9)=10

C(10,10)=1

  1. 362880

  2. 0.061

  3. 3

  1. approx. 0.157

  2. 0.373

  1. 0.62

  2. 0.202

  3. 0.385

  4. 0.471

  1. 0.144

  1. 1.24

P(0 hypertensives)=0.5514

P(1 hypertensive)=0.3631

P(2 hypertensives)=0.0797

P(3 hypertensives)= 0.0058



  1. 0.004

  2. 0.172

  3. the overall mortality rate among hypertensives would be reduced by 1.9%

  1. 0.52

  2. 0.435

  1. 0.104

  2. 10.4

  1. 0.049<0.5 therefore we conclude that there is a significan excess of Down's syndrome cases in the area

  2. 0.0263

  3. 0.0532 >0.05 therefore we conclude that there is not a significant excess of cleft-palate cases in the area

  1. 0.235

  1. 0.436

  1. 0.935

  2. 14. years

  1. An incidence rate = P(becoming blind over the next year | not blind at the beginning of this year).

  2. A cumulative incidence of 10% over 14.2 years means that after 14.2 years there is a 10% probability that a female with IDDM will become blind.