So, exercise is always better than no exercise (20 > 10; 8 > -2) and dieting is always better than no dieting (20 > 8; 10 > -2) (the main effects establish this). But, dieting and exercise is particularly effective than either dieting or exercise alone (20 > 15; 20 > 14). Sometimes you can have no main effects but still have an interaction:
Attention JMT Hikers: On February 2, 2015, NPS began enforcing an exit quota for backpackers exiting Yosemite over Donahue Pass. For more information, please visit Wilderness Permits for John Muir Trail Hikers. Yosemite Wilderness Permit Reservations Wilderness permit reservations are available up to 24 weeks (168 days) in advance. View a table with the earliest dates for reservation requests. Reservations are not available one day in advance or on the day of your hike (see below for information about first-come, first-served permits).
How to Get a Permit if You are Under 18 Check List. You must be at least 15 Â½, but under 18 years to get a permit. To obtain a permit you must: Make an appointment before visiting a DMV office (walk-ins are only accepted at our Driver License Processing Centers). Complete a Driver License or Identification Card Application form (DL 44) including your parents' or guardians' signatures. To obtain this form by mail, call DMV's automated phone service 24 hours a day, 7 days a week at 1-800-777-0133.