Doctors have two methods of calculating maximum heart rate.
with the first method, maximum heart rate, y, in beats per minute
sy= 220 - x, where x is the person's age. maximum heart rate
with the second method is shown in the table. (example 1)
age, x
20 | 30 40 50 60
heart rate (bpm), y 194 187 180 173 1 66
2. are heart rate and age proportional or nonproportional for each method?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels. ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0