In the year 2000, the population of a certain country was 282282 million with an estimated growth rate of 0.70.7% per year. a. based on these figures, find the doubling time and project the population in 21002100. b. suppose the actual growth rates are just 0.2 percentage points lower and higher than 0.70.7% per year (0.50.5% and 0.90.9%). what are the resulting doubling times and projected 21002100 population? a. let y(t) be the population of the country, in millions, t years afte

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: