Grade 12 math probability distribution

1. The standard normal curve has which of the following properties? a. a mean of 0 and a standard deviation of 0 b. a mean of 0 and a standard deviation of 1 c. a mean of 1 and a standard deviation of 0 d. a mean of 1 and a standard deviation of 1 2. For the distribution described by has a standard deviation o a. 9b. 4.84 c. 3 d. 2.2 3. For a population with a mean of 100 and a standard deviati of 15, what percent of the data would be between 70 and 130? a. 68% b. 95% c. 99.7% d. Impossible to determine 4. For the distribution in question 3, 16% of the data would be a. less than 55 b. between 70 and 100 c. less than 85 d. between 100 and 115 5. For a standard normal distribution P(Z > 0.85) is: a. 0.1977 b. 0.8023 c. 1.04 d. -1.04