The average annual return over the period 1926-2009 for the s& p 500 is 12.8%, and the standard
deviation of returns is 21.4%. based on these numbers, what is a 67% confidence interval for
2010 returns?
a) -1.3%, 20.5%
b) -8.6%, 34.2%
c) -25.8%, 54.7%
d) -25.8%, 47.9%

List the 10 possible samples (without replacement) of size 3 3 that can be obtained from the population of five officials.

Plz need answer now will mark which situations represent linear functions? check all that apply. a)the temperature rises and falls over the course of a day. temperature is a function of time. b)a baseball is hit into the outfield. the height of the ball is a function of time. c)a car goes 55 mph on the highway. distance is a function of time. d)a child grew 2 inches this year and 1 inch last year. height is a function of time. e)a movie director makes 2 movies per year. the number of movies is a function of the years.

Martin likes to make flower bouquets that have 3 daffodils and 4 tulips per vase. a daffodil has a mass of d grams, a tulip has a mass of t grams, and the vase has a mass of u grams. the expression 5(3d + 4t + v) describes the mass of 5 bouquets. match each amount in the situation with the expression that represents it. situation expression number of bouquets mass of one bouquet mass of the tulips in one bouquet 4t mass of the daffodils in one bouquet 3d + 4t + v