Question 15 3 pts 80% Suppose we want to verify if the mean weights for boxes of apples, sorted and filled by two different machines are statistically different. Following Questic information is available with usual definitions for the two groups of boxes of apples: Suppose n1= 70 X1=$16 01 =$4.20 and n2= 50 X2 between =$14.00 02 =$3 are unkr and na = The value of the test statistics for testing if the means of the two appropr populations are different is: t dis O z = 2.8813 t dis t dis Ot = 3.0429 F dis t = 2.8813 z = 3.0429Question 10 80% An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and post-training customer survey. In order to compare the differences, they computed: Questio d = post-training survey score - pre-training survey score. Suppose Twelve customers were randomly selected and completed both surveys. If between are unkn the mean and standard deviation of d for the sample turn out to be 2.4 and and na 4, respectively. What is the value of the test statistic? appropria 1.8444 t dist It dist 0.1732 t dist 7.2000 F dist 2.0785Question 17 3 pts 0 95% D 80% A random sample of 70 baby boys, show they weighed 3500 grams on average with a standard deviation of 90, at birth. While a random sample of 50 baby girls show they weighed 3000 grams on average with a standard Question deviation of 65. In order to test the hypothesis that if these two populations have the same variance or not, what is the value of test Suppose i statistic? between are unkno and na - O 0,722 appropria O 1,385 t distr O 1,917 t dist O 0,522 D Question 18 49 pots75% 0 0522 O 64% 0 95% 80% Question 18 49 pts Folow die instructors below to complete your exam: Question 6 1. Download the exam file by dickking on the exam title here. 85 018 181 Oxarcrative Methods for Business Management [Final Suppose independ between the meat are unknown but 2 Work on your Word cooment, save it frequently. and n2 = 44. The s a. To submit your exam, return to your Quercus quiz window. appropriate distrit 4. At the bottom of your question, please dick on "Choose a File". 5. Crosse the cran file (only the exam document with your answers) and t distribution dick open Your screen will show "Your file has been successfully t distribution v t distribution w 6. Click on "Submit ONZ, This completes your exam, F distribution Classes File