10. For each of The following: IdenTify The ParameTer(s) and The disTribuTion IdenTify The H0 and H1 LisT The calcuIaTor TesT you could uSe To check your answer (NO MATH NEEDED!) a) In 2020, The mean for The number of children per hou5ehold was 7.9. A poll of 1023 households conducTed This year reporTed The mean for The number of children per household To be 1.8. Assuming The populaTion sTandard deviaTion is known To be 3.4, is There sufficienT evidence To supporT The claim ThaT The mean number of children has decreaSed since 2010 aT The a 20.1 level of significance? b) A recenT sTudy claimed ThaT aT mosT 15% of junior high sTudenTs are overweighT. In a sample of 160 sTudenTs, 30 were found To be overweighT. AT a = 0.05, TesT The claim. c) A shipping firm suspecTs ThaT The mean life of a cerTain brand of Tire used by iTs Trucks is more Than 35,000 miles. To check The claim, The firm randomly SelecTs and TesTs 18 of TheSe Tires and geTs a mean IifeTime of 37,200 miles wiTh a sTandard deviaTion of 1200 miles. AT a = 0.01, TesT The claim