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Each of the following studies examines the relationship between the quality of breakfast and academic performance for third-grade children. Identify which is correlational, which is experimental, and which is nonexperimental.
Study 1: A researcher obtains a sample of 100 third-grade children. Each child is interviewed to determine his typical breakfast, and the child is assigned a score describing the nutritional value of his breakfast. Also, the child's level of academic performance is obtained from school records. The results show that higher academic performance tends to be associated with a higher level of breakfast nutrition.
Study 2: A researcher obtains a sample of 100 third-grade children. The children are randomly assigned to two groups. On arriving at school each morning, one group is given a nutritious breakfast and the other group is given a breakfast relatively low in nutritional value. After 6 weeks, each child's level of academic performance is measured. On average, the children in the nutritious breakfast group had a higher level of academic performance than the children in the low-nutrition group.
Study 3: A researcher obtains a sample of 100 third-grade children. Based on school records, the children are divided into two groups corresponding to high and low academic performance. The children are then interviewed and each child is given a score describing the nutritional value of her typical breakfast. On average, the children in the high academic performance group ate a more nutritious breakfast than the children in the low academic performance group.
Now assume that you will earn 10% from now through the end of your retirement. You want to make 20 end-of-year deposits into your retirement account that will fund the 30-year stream of $20,000 annual annuity payments. How large do your annual ..
Final Exam Calculate the Future Value of an Annuity that has the following characteristics: (a) PMT: $956, (b) RATE: 8%, and (c) NPER: 20. Determine how much you would be willing to pay for an annuity due that has the following characteristics: (a) ..
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the following data concern an investment projectinvestment in equipment10000net annual cash inflows2400working capital
1. What is the implied annual rate if you deposit $750 and receive $2,000 in 8 years, assuming interest is compounded quarterly?
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