Hello, can someone please help me? I am struggling bad and I need help.

**There's 4 parts**

Thank you

Chrome File Edit View History B Bookmarks Profiles b Window Help ON ) 7 4 8 Fri 10:46 PM Q E Unit 7: MyStatLab Homework X Do Homework - Week 7 Homev X Homework Help - Q&A from Or X G how to screenshot on mac - Gc x + C mathxl.com/Student/PlayerHomework.aspx?homeworkld=613088984&questionld=1&flushed=true&cld=6751563&back=https://www.mathxl.com/Stude... * Apps Bookmarks f FB @ IG YT N Netflix Canvas MyPark FAFSA-Park C P0338- TEXT CITATIONS "> Other Bookmarks Reading List MA120DLBF2A2021 Basic Concepts of Statistics Ashley Martinez & | 12/04/21 12:46 AM =Homework: Week 7 Homework Question 9, 8.4.9-T HW Score: 23.33%, 2.33 of 10 points Part 1 of 4 O Points: 0 of 1 Save The piston diameter of a certain hand pump is 0.8 inch. The manager determines that the diameters are normally distributed, with a mean of 0.8 inch and a standard deviation of 0.005 inch. After recalibrating the production machine, the manager randomly selects 25 pistons and determines that the standard deviation is 0.0043 inch. Is there significant evidence for the manager to conclude that the standard deviation has decreased at the a = 0.05 level of significance? What are the correct hypotheses for this test? The null hypothesis is Ho: The alternative hypothesis is H,: Help me solve this View an example Get more help - Clear all Check answer DEC Dictionary 3 V Aa F