The Paleo diet allows only for foods that humans typically consumed over the last 2.5 million years, excludlng those agriculture-type foods that arose during the last 10,000 years or so. Researchers randomly divided 500 volunteers into two equal-sized groups. One group spent 5 months on the Paleo diet. The other group received a pamphlet about controlling portion sizes. At the beglnnlng of the study, the difference in mean weight between the two groups was approxlmately equal to a. After the study, the Paleo group had lost on average of 7 pounds with a standard deviation of 20 pounds while the control group had lost on average of 5 pounds with a standard deviation of 12 pounds. Do the data provide convincing evidence that the Paleo diet is more effective for weight loss than the pamphlet(control)? (a) state the null hypothesis OHoiMpuim-umtmi>0 Hozupaim-ummi=0 o Hoiupim-ummi0 o HA1HWm7HmNd