IQ scores are normally distributed with a mean of 100 and a standard deviation of 16. a) What percent of people have an IQ of less than 68?
b) What percent of people have an IQ between 100 and 132?
c) Write a 68% confidence interval.
d) If 10,000 people are studied, how many will score above a 148 on the IQ?

What is the shape of the height and weight distribution

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1