10   Question 3 continued A 95% confidence interval for the weight, in grams, of salad eaten by the children who prepared the meal with their parent is (71.0, 121.8) (b) Give a full explanation of the evidence provided about Klazine’s belief by the confidence interval in (a), together with the interval given above. (3) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Turn over 11   Question 3 continued Klazine measured the weight of cauliflower, in grams (g), eaten by the children in each group. Her results are shown in Figure 4. Cauliflower eaten (g) n Mean SD Child prepared with parent 25 110.5 50.1 Parent prepared alone 22 89.7 51.3 [Data source: https://doi.org/10.1016/j.appet.2014.03.030] Figure 4 (c) Making any necessary assumptions, use a t‑test to investigate whether the children who prepared their meal with a parent ate over 10 grams more cauliflower, on average, than the children whose parent prepared the meal alone. (8) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________