Let denote the change in price per share for company where end of 1st quarter of 2012 price per share minus the beginning of 2012 price per share. use the sample mean of these values to estimate the dollar amount a share of stock has changed during the 1st quarter. 3.49 (to 2 decimals) b. what is the confidence interval estimate of the population mean change in the price per share of stock during the first quarter

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set