In a hypothetical population of 1,000 people, tests of blood-type genes show that 165 have the genotype AA, 470 have the genotype AB, and 365 have the genotype BB. i need help finding the chi square value and please explain how u did it, can someone also explain this p value null hypothesis?

You have trained year for a marathon. in your first attempt to run a marathon, you decide that you want to complete this 26-mile race in 4-5 hours. a. what is the length of a marathon in kilometers (1mile= 1.6 kilometers). b. what would your average speed have to be to complete the race 4.5 hours? give your answer in kilometers per hour.