You have a cell phone plan that charges you different amounts per GB based on the number of GBs used each month. They charge $11 per GB for the first 3 GB of data you use. After 3 GB up to 5 GB, the company charges $9 per GB of use. When you go over 5 GB of data the company reduces the price more and you pay $6 per GB. Which piecewise function, models, the cost of the cell phone for x minutes used in a month?

You are in charge of the customer service phone line with many employees. at the end of each phone callthe customers are asked to rate their service from 1 to 5 stars, with 5 being the best. you find the averagerating for 20 randomly selected employees and decide you want to improve the ratings so you require thoseemployees to go through a new training program. you then wait a week and find the new average rating foreach employee. the average change is an increase in 1.3 stars with a standard devation of .9 stars.(a) is this data paired or not paired? (b) what are the null and alternative hypothesis being tested? (c) what is the t-statistic you would use? write the general formula and the final calculation.(d) sketch a t-distribution, label your t-statistic and the probability you would be interested in: