Table 1.
t-test results for price of each produce and food item at grocery (n = 40) and dollar discount stores (n = 14) in Las Vegas Metropolitan area in summer 2015.
| Food Type | Store Type | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Grocery Store | Dollar Discount Store | ||||||||
| M | SD | n | M | SD | n | 95% CI | t | df | |
| Banana | 0.15 | 0.03 | 40 | 0.18 | 0.10 | 14 | −0.085, 0.037 | −0.85 | 13.8 |
| Apple | 0.62 | 0.25 | 40 | 0.36 | 0.27 | 8 | 0.061, 0.046 | 2.63 * | 46.0 |
| Orange | 0.48 | 0.60 | 40 | 0.12 | 0.32 | 12 | 0.005, 0.704 | 2.04 * | 50.0 |
| Grapes | 0.87 | 0.52 | 36 | 0.28 | 0.0 | 13 | 0.297, 0.882 | 4.05 *** | 47.0 |
| Cantaloupe | 2.00 | 0.87 | 40 | 0.99 | 0.0 | 14 | 0.730, 1.29 | 4.31 *** | 39.0 |
| Peach | 0.82 | 0.35 | 19 | 0.20 | 0.07 | 8 | 0.440, 0.793 | 7.25 *** | 21.4 |
| Strawberry | 0.96 | 0.30 | 40 | 0.32 | 0.0 | 12 | 0.548, 0.740 | 13.56 *** | 39.0 |
| Honeydew Melon | 3.15 | 0.85 | 39 | 1.19 | 0.46 | 12 | 1.580, 2.36 | 10.29 *** | 35.0 |
| Watermelon | 3.76 | 0.95 | 40 | 1.88 | 2.80 | 10 | −0.131, 3.905 | 2.10 | 9.5 |
| Pear | 0.67 | 0.27 | 40 | NA | 0 | ||||
| Carrot | 0.11 | 0.03 | 40 | 0.08 | 0.02 | 12 | 0.017, 0.054 | 3.85 *** | 50.0 |
| Tomato | 0.47 | 0.21 | 40 | 0.34 | 0.15 | 14 | 0.007, 0.255 | 2.12 * | 52.0 |
| Sweet Pepper | 0.95 | 0.52 | 40 | 0.50 | 0.0 | 11 | 0.287, 0.616 | 5.54 *** | 39.0 |
| Broccoli | 1.85 | 0.76 | 40 | 0.91 | 0.18 | 13 | 0.669, 1.194 | 7.13 *** | 49.1 |
| Lettuce | 1.35 | 0.44 | 40 | 1.35 | 0.13 | 14 | 0.242, 0.554 | 5.13 *** | 51.4 |
| Corn | 0.63 | 0.27 | 40 | 0.28 | 0.04 | 8 | 0.257, 0.440 | 7.67 *** | 45.2 |
| Celery | 1.35 | 0.49 | 40 | 0.99 | 0.0 | 11 | 0.206, 0.522 | 4.67 *** | 39.0 |
| Cucumber | 0.67 | 0.29 | 40 | 0.66 | 0.24 | 14 | −0.175, 0.171 | −0.02 | 52.0 |
| Cabbage | 1.38 | 0.71 | 39 | 0.99 | 0.0 | 14 | 0.155, 0.618 | 3.38 ** | 51.0 |
| Cauliflower | 2.09 | 0.76 | 40 | 0.99 | 0.0 | 9 | 0.857, 1.341 | 9.18 *** | 47.0 |
| Whole-Milk | 0.03 | 0.01 | 40 | 0.02 | 0 | 14 | 0.007, 0.113 | 9.05 *** | 52.0 |
| LF 2% Milk | 0.03 | 0.01 | 40 | 0.02 | 0 | 14 | 0.006, 0.010 | 8.43 *** | 52.0 |
| 100% Juice | 0.05 | 0.01 | 40 | 0.03 | 0 | 13 | 0.020, 0.27 | 12.43 *** | 39.0 |
| Juice Drink | 0.03 | 0.01 | 39 | 0.02 | 0.0 | 11 | 0.012, 0.016 | 13.29 *** | 39.0 |
| Reg. Ground Beef | 0.26 | 0.04 | 40 | 0.23 | 0.05 | 7 | −0.005, 0.060 | 1.71 | 45.0 |
| Reg. Hot-Dog | 0.26 | 0.12 | 40 | 0.08 | 0 | 14 | 0.146, 0.223 | 9.74 *** | 39.0 |
| LF Hot-Dog | 0.28 | 0.12 | 40 | 0.08 | 0 | 14 | 0.158, 0.236 | 9.92 *** | 39.0 |
| Reg. Frozen Dinner | 0.26 | 0.06 | 40 | 0.06 | 0.00 | 14 | 0.176, 0.214 | 20.43 *** | 40.2 |
| LF Frozen Dinner | 0.23 | 0.05 | 36 | 0.06 | 0.00 | 14 | 0.155, 0.189 | 20.54 *** | 36.4 |
| Bagel | 0.55 | 0.16 | 39 | 0.14 | 0.04 | 12 | 0.362, 0.470 | 15.40 *** | 47.5 |
| Danish | 0.92 | 0.26 | 40 | 0.13 | 0.01 | 13 | 0.708, 0.875 | 19.13 *** | 39.3 |
| 100% WW Bread | 0.16 | 0.03 | 40 | 0.25 | 0 | 13 | −0.097, −0.785 | −19.16 *** | 39.0 |
| White Bread | 0.15 | 0.02 | 40 | 0.20 | 0.01 | 14 | −0.560, −0.389 | −11.10 *** | 51.2 |
| Reg. Coke Soda | 0.04 | 0.01 | 40 | 0.02 | 0.00 | 13 | 0.137, 0.172 | 17.75 *** | 39.0 |
| Diet Coke Soda | 0.04 | 0.01 | 40 | 0.02 | 0.00 | 14 | 0.137, 0.172 | 17.75 *** | 39.0 |
| Reg. Cereal | 0.38 | 0.38 | 40 | 0.17 | 0.10 | 14 | 0.006, 0.423 | 2.06 * | 52.0 |
| Low-Sugar Cereal | 0.36 | 0.45 | 40 | 0.20 | 0.22 | 14 | −0.938, 0.415 | 1.27 | 52.0 |
| Reg. Chips | 0.36 | 0.06 | 40 | 0.30 | 0.15 | 14 | −0.032, 0.144 | 1.36 * | 52.0 |
| Baked Chips | 0.54 | 0.41 | 33 | 0.09 | 0.03 | 14 | 0.229, 0.673 | 4.09 *** | 45.0 |
M = mean; SD = standard deviation; df = degrees of freedom; Reg. = Regular; LF = Low fat; WW = whole wheat. * = p < 0.05, ** = p < 0.01, *** = p < 0.001.