Question

control option command commandoption 5. Suppose that distribution of serum cholesterol levels in the UK adults is normally distributed with a mean of 220mg/dl and a standard deviation of 35mg/dl. What is the probability of selecting a person with a cholesterol level less than 250mg/dl? a. 0.0000 b. 8.051% c. 0.305 1 .3 ??236 80.23% Suppose that distribution of serum cholesterol levels in the UK adults is normally distributed with a mean of 220mg/dl and a standard deviation of 35mg/dl. What is the probability of selecting 4 people with a cholesterol leyel less than 250mg/dl? a 95.64% 1.0000 /250-no C.95 634) c. 95.64 d.-4.36% , oie eneugh evidence when

Answer 1

Z = x - mue/sigma = 250 - 220 /35 = 0.86 The required probality is p(z < 0.86) = 0.8051, by standard normal table z = x - mue/sigma/squareroot n = 250 - 220/35/ squareroot 4 = 1.71 The required probability is p(z < 1.71) = 0.9564, by standard normal table = 95.64%