I need help explaining these two questions for my homework.
Question 19 6 pts Free Response: Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. You can type in your answers below or upload an image of your answers using the upload image icon on the toolbar above the textbox. [2] One way to handle stress is to write things down. Studies have shown that journaling is a valuable tool to improve mental health. At Eastside high school a group of 25 incoming freshmen volunteered for a seminar on improving mental health in high school. Journaling was one of the topics covered. Every month throughout their high school careers, these students met with a faculty advisor who encouraged students to continue to use journaling to improve their stress level in high school. The principal wanted to determine whether this method had any effect on the student's GPA. At the end of their senior year, the journaling students' GPA's were compared to 28 "non-journaling" students who took the same course loads throughout high school. The data is shown in the box plots and the descriptive statistics below. Journaling Students Non-Joumaling Students GRA l-Var Stats i=3.1394@38@7 i=2.914594592 2x=78.48509516 2x=81.60864857 Ex==247.3769148 2x3=241.6147175 Sx=0.2021249888 Sx=0.3731@46805 cx=0.1980412347 0x=eu366381523 n=25 n=28 minX=2.823668365 m1nX=2.179623385 L0 1 =3 _ 950335303 L0 1 =2. 636800759 1-Var Stats 1-Var Stats x=3. 139403807 x=2. 914594592 Ex=78. 48509516 Ex=81. 60864857 Ex2=247. 3769148 Ex 2=241. 6147175 SX=0. 2021249888 SX=0. 3731046805 ox=0. 1980412347 ox=0. 366381523 n=25 n=28 minx=2. 823668365 minx=2. 179623385 LQ1=3. 000386303 LQ1=2. 636000759 Med=3. 098258297 Med=2. 911361971 Q3=3. 265856316 Q3=3. 174903425 maxx=3. 573647271 maxx=3. 703614676 Journaling Students Non-Journaling Students A) Describe the differences in the center between the Journaling and Non-Journaling Students' GPA's. B) Describe the differences in the spread between the Journaling and Non-Journaling Students' GPA's. C) The principal wanted to determine whether this method had any effect on the student's GPA. Use the information provided to write a statement for the principal.Question 18 6 pts Free Response: Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. You can type in your answers below or upload an image of your answers using the upload image icon on the toolbar above the textbox. IS] The time required by a certain shop to serve a customer a pizza has approximately a normal distribution with a mean of 12.3 minutes and a standard deviation of 1.7 minutes. To attract customers, the shop does not charge for a pizza if a customer has to wait more than 15 minutes after placing an order. A) John had to wait 13.5 minutes. What proportion of customers wait longer than John? B) What proportion of customers wait between 11 and 13 minutes? C) What proportion of pizzas are free because of this offer? D) The manager wants to reduce the number of free pizzas. How should he change the time (for the free pizza) so only 3% of the customers receive free pizzas
