Adam Feldman,
Ak» bol Yaga Retreat & Eco Resort, Belize Chocolate Company, Belize Fitness, Belizean Arts, Belizean Breezes Soap Co., Ben Popik, Bernadette Damper, Black Orchid Restaurant, Blue Water Grill, Bob Hawkins, Casa Picasso, Caye Supplies, CG Esthetic, Chez Caribe, ChiChi Rodriguez, Costa Blu Resort, Creative Tours, Daydreamin» Bed & Breakfast, Dixie Bowen, El Fogon, Elivi's Kitchen, EVOO, Felicity Sailing Belize, French Bakery Connection, Gecko Graphics, Greenhouse, Heaven's, Iraida Gonzalez, Island Essentrics, Island Life Teeth Whitening, Island Tackle, Jack Burnett, Jackie Feldman, Jason Baranec, Lesley Nolan, Lola's, Lolly & Glen Slattery, Mambo Chill, Marbucks Coffee House, Marie Carroll, Maxi's, Melody Wolfe, My Beauty Salon, Palapa Bar, Pampered Paws, Pier 366, Polish Salon, Premium Wines, Rachael Roe — Signature Belize Weddings, Rain, Reinland Meats, Sandy
Point Resorts, Science and Soul Wellness, Seaduced, Serendipity, Sheryl Hitchens, Sol Spa, Stax, Stella's Smile, Sundiver Beach Resort, Terry Gallagher, Thaiane Ribeiro, The Color Ginger, The Dive Bar, The French Touch, The Hidden Treasure Restaurant, Tropic Air, Vellie Williams, Victoria House, Wine Divine, Xsite Belize Sailing Adventures, Truck Stop and Zen Belize.
bk, c is the upper grade difficulty parameter (the
point on the ability scale that corresponds to a probability of a certain response of 0.5) for category c of item k, and
ak is the discrimination parameter (estimates how well an item can differentiate among respondents with different levels of ability) for item k. Acceptable
ak should be above 0.5, and appropriate mean bk should be between — 3.0 and 3.0.39