Aresearcher administers a treatment to a sample of participants selected from a population with µ = 80. if the researcher obtains a sample mean of m = 88, given the same alpha level, which combination of factors is most likely to result in rejecting the null hypothesis?

(note i put the graph in so plz )the graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel. what is the slope of the line

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

If you answer 2+2 you will get over 80 points