To find the probability of students with masses more than 72 kg, we need to calculate the z-score first.
Z = (X - μ) / σ
Z = (72 - 68) / 9
Z = 0.44
Next, we find the probability of z-score greater than 0.44 using a standard normal distribution table or calculator. This gives us a probability of 0.3300.
Therefore, the correct answer is 0.33.
Suppose the mass of students, in kg is N(68; 9) distributed. Find the probability of students with the masses more than 72 kg.
0.9082
0.0918
0.6700
0.33
1 answer
1 answer