Wi Thursday 67 65 68 68 68 70 69 70 sp Friday 68 70 69 71 72 69 70 70 sp be Source: Washington Observer-Reporter in 7. Reducing Errors in Grammar A composition teacher wishes to see whether a new smartphone app will re- duce the number of grammatical errors her students make when writing a two-page essay. She randomly se- lects six students, and the data are shown. At a 0.025, can it be concluded that the number of errors has been 12. reduced? Student 4 5 6 Errors before 12 0 5 4 3 Errors after 6 1 3 2 8. Overweight Dogs A veterinary nutritionist developed a diet for overweight dogs. The total volume of food consumed remains the same, but one-half of the dog food is replaced with a low-calorie "filler" such as

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