The hourly rate of substitute teachers for 12 local school districts is given below. Assuming that the data are normally distributed, use a TI-83, TI-83 plus, or TI-84 calculator to find the 90% confidence interval for the mean hourly rate of substitute teachers in the region. Round your answers to two decimal places and use ascending order. 20 13 21 18 19 22
19 15 12 12 18 21

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4