The data for fuelefficiencyof a diesel engine in a combustion testas follows: a. what is the range of the true (or population) mean of eachdata set for 80% confidence level? (10pts).b. calculate the standard normal distributionz and p(z)for data set #1. identify any outliers data for 80% confidence level. (10 pts)c. use chouvenet ‘s criterion to identify any outliers for dataset #1

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.