Introduction to Actuarial Science - Week 2
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Questions and Answers

The formula for finding the term of an annuity requires the future value, the annual interest rate, and the amount of the periodic payment.

True

The term of an ordinary annuity can be found using a formula that involves the natural logarithm.

True

To calculate the term of an annuity, at least three variables are required.

True

The amount of the periodic payment can be calculated using the formula for the future value of an annuity.

<p>False</p> Signup and view all the answers

A perpetuity is an annuity where the end of the term is known and finite.

<p>False</p> Signup and view all the answers

To find the term of an annuity, the future value is divided by the annual interest rate, and then the result is added to $1$.

<p>False</p> Signup and view all the answers

A contingent annuity has a known starting date but an uncertain ending date, typically tied to an event like death.

<p>True</p> Signup and view all the answers

An annuity certain is defined as an annuity where both the beginning and end of the term are known and set in advance.

<p>True</p> Signup and view all the answers

Investments are the only examples of annuities, as they involve regular payments over time.

<p>False</p> Signup and view all the answers

For a quarterly annuity with a term of one year, the last payment would be due at the beginning of the fourth quarter.

<p>False</p> Signup and view all the answers

The formula for calculating the future value of an ordinary annuity is essentially the same as the formula for calculating the future value of a single lump sum investment.

<p>False</p> Signup and view all the answers

If you were to invest $1,000 at an annual interest rate of 7% for 3 years, you would accumulate more money if the interest compounded monthly than if it compounded quarterly.

<p>True</p> Signup and view all the answers

The future value of an annuity can be calculated using the formula $FV = PV(1 + r)^{t}$, where FV represents the future value, PV represents the present value, r represents the interest rate, and t represents the time period.

<p>False</p> Signup and view all the answers

In the first quarter of an ordinary annuity, the future value is equivalent to the initial principal amount multiplied by $(1 + r)^3$.

<p>True</p> Signup and view all the answers

The future value of an ordinary annuity with 'n' payment terms is calculated by adding the future values of each payment term.

<p>True</p> Signup and view all the answers

If an ordinary annuity has an interest rate of 5% compounded annually, and the payment term is 10 years, the future value factor is calculated as (1 + 0.05)^10 - 1 / 0.05.

<p>True</p> Signup and view all the answers

For a quarterly compounding ordinary annuity, the interest rate must be divided by 4 to obtain the quarterly interest rate.

<p>True</p> Signup and view all the answers

If Adam contributes $1,200 annually to his retirement account for 40 years at an interest rate of 6% compounded annually, his total retirement fund will be approximately $185,714.36.

<p>True</p> Signup and view all the answers

If Kelvin deposits $150 monthly into his son's education fund for 12 years, with an interest rate of 4% compounded quarterly, the son's education fund will be approximately $25,000 when he turns 18.

<p>False</p> Signup and view all the answers

If Eben makes monthly payments of $200 for a mortgage with a 3% annual interest rate compounded semiannually for 25 years, the total amount he will have paid by the age of 50 will be approximately $88,419.39.

<p>False</p> Signup and view all the answers

The future value formula for an ordinary annuity can be rewritten as FV = A * Sn ¬r, where Sn ¬r is the future value factor.

<p>True</p> Signup and view all the answers

The monthly interest rate for a trust fund paying 6.5% compounded monthly is 0.0054.

<p>True</p> Signup and view all the answers

To calculate the current value of an annuity with quarterly payments, you should use the formula $CV = A * 1/(1 + r)^{-n}$.

<p>False</p> Signup and view all the answers

If an annuity pays $3,750 at the end of each quarter for 7 years at an interest rate of 8%, the total number of payments is 28.

<p>True</p> Signup and view all the answers

The formula for future value (FV) of an ordinary annuity is $FV = A (1 + r)^n - 1$.

<p>True</p> Signup and view all the answers

If Jim deposited $18,000 in his savings account, he would receive less than $1,800 as a semiannual payment at 12% interest compounded semiannually for 6 years.

<p>False</p> Signup and view all the answers

Samantha's quarterly deposit for a $17,000 car at 8% interest compounded quarterly for 5 years should be calculated using the current value formula.

<p>True</p> Signup and view all the answers

For the formula $CV = A * a_n¬_r$, the variable 'A' represents the current value.

<p>False</p> Signup and view all the answers

The formula for calculating the payment (A) of an ordinary annuity is $A = CV * r / (1 - (1 + r)^{-n})$.

<p>False</p> Signup and view all the answers

Study Notes

Introduction to Actuarial Science - Week 2

  • Actuarial science is a field focused on assessing the financial impact of risk and uncertainty.
  • Actuaries use mathematical and statistical methods to price insurance, manage investments and so on.

Core Areas of Application

  • Definition and scope: Actuarial science encompasses various areas, like pricing insurance contracts, calculating pension liabilities, modeling financial risk, etc.
  • Role of Actuaries: Actuaries play a crucial role in assessing risks and financial implications of events and issues with actuarial models, for example to calculate premiums for insurance/pension products.
  • Simple and Compound Interest: Understanding the difference between simple and compound interest is basic in actuarial science. Compound interest is a crucial concept in actuarial tasks like calculating the present value of future income.
  • Recap: Calculating values for investments given interest rates and timeframe. For instance, what is the future value of $1,000 at 7% after 3 years compounded monthly or weekly?

Annuities

  • Annuity: A series of equal payments made at regular intervals of time. Examples including periodic savings, mortgage payments, insurance premiums or pensions.
  • Types: There are different types of annuities, such as:
    • Annuity certain: Payments are guaranteed for a specified period.
    • Contingent annuity: Payments depend on a future event, such as death or survival in life insurance policy.
    • Perpetuity: An annuity that continues indefinitely.

Future Value of Ordinary Annuity

  • Formula: Accumulation of an ordinary annuity over a set period of time is given by $FV = A[(1+r)^n−1]/r$.
  • Example: Adam starting savings at $1200 yearly to collect retirement funds.

Current Value of Ordinary Annuity

  • Formula: $CV= A[1-(1+r)^{-n}]/r$. This is the present value of an ordinary annuity.
  • Example: A trust fund that pays $500 monthly for 10 years at 6.5% compounded monthly.

Table Method

  • Future Value (FV): Use the FV tables to calculate the future value of an annuity.
  • Present Value(PV): Using PV tables.
  • Example: Using tables to find the future or present value given an annuity.

Finding the Term

  • Future Value: Formula: n = [ln(FV/A + 1)]/ln(1+r).
  • Present Value: Formula: n = [ln(1 − (CV/A))]/ln(1+r).

Additional Examples and Problems

  • Several real-life situations or problems are presented for practice.
    • Finding the payment amounts for various scenarios.
    • Calculating how long it takes for savings to accumulate.

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Explore the fundamentals of actuarial science in this week's quiz. Understand the scope, role of actuaries, and key concepts like simple and compound interest. Test your knowledge on how actuaries assess financial risks and pricing for insurance and pension liabilities.

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