Students from a marketing research class are involved in a project about the level of sleep, exercise, and stress individuals experience. They have decided to collect data from three student-center areas on campus. When they analyze their data they find the responses are very similar across the three areas. The students feel comfortable they have achieved which of the following with regard to their data? a. reliability
b. causal relationships
c. validity
d. sampling accuracy
e. measurability

Bill is 31 years old, married, and lived with his spouse michelle from january 2018 to september 2018. bill paid all the cost of keeping up his home. he indicated that he is not legally separated and he and michelle agreed they will not a file a joint return. bill has an 8-year-old son, daniel, who qualifies as bill's dependent. bill worked as a clerk and his wages are $20,000 for 2018. his income tax before credits is $500. in 2018, he took a computer class at the local university to improve his job skills. bill has a receipt showing he paid $1,200 for tuition. he paid for all his educational expenses and did not receive any assistance or reimbursement. bill does not have enough deductions to itemize. bill, michelle, and daniel are u.s. citizens with valid social security numbers. 8. bill does not qualify to claim which of the following: a. head of household b. education benefit c. earned income credit d. all of the above