A school social worker wants to determine if the grade distribution of?home-schooled children is different in her district than nationally. A national statistical center provided her with the data in the first table?below, which represent the relative frequency of?home-schooled children by grade level. She obtains a sample of 30 ?home-schooled children within her district that yields the data in the second table below. Complete parts ?(a) and ?(b).

H. Data Table X Grade Relative Frequency Grade Frequency Full data set K 0.045 K 7 1-3 0.245 1-3 10 4-5 0.137 4-5 4 6-8 0.277 6-8 5 9-12 0.296 9-12 4 Print Done(a) Because of the low cell counts, combine cells into three categories K-3. 4-8, and 9-12. Grade Relative Frequency Observed Frequency Expected Frequency K3 D D D D D D D D E (Type integers or decimals rounded to three decimal places as needed.)