Contemporary Mathematics for Business & Consumers
8th Edition
ISBN: 9781305886803
Author: Brechner
Publisher: Cengage
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Chapter 10.II, Problem 7TIE
Telex Electronics borrowed money at 9% interest for 125 days. If the interest charge was $560, use the ordinary interest method to calculate the amount of principal of the loan.
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Module Code: MATH380202
3. (a) Let {} be a white noise process with variance σ2.
Define an ARMA(p,q) process {X} in terms of {+} and state (without proof)
conditions for {X} to be (i) weakly stationary and (ii) invertible.
Define what is meant by an ARIMA (p, d, q) process. Let {Y} be such an ARIMA(p, d, q)
process and show how it can also be represented as an ARMA process, giving the
AR and MA orders of this representation.
(b) The following tables show the first nine sample autocorrelations and partial auto-
correlations of X and Y₁ = VX+ for a series of n = 1095 observations. (Notice
that the notation in this part has no relationship with the notation in part (a) of
this question.)
Identify a model for this time series and obtain preliminary estimates for the pa-
rameters of your model.
X₁
= 15.51, s² = 317.43.
k
1
2
3
4
5
6
7
Pk
0.981
0.974
0.968
akk 0.981 0.327
8
9
0.927
0.963 0.957 0.951 0.943 0.935
0.121 0.104 0.000 0.014 -0.067 -0.068 -0.012
Y₁ = VX : y = 0.03, s² = 11.48.
k
1…
Let G be a graph with n ≥ 2 vertices x1, x2, . . . , xn, and let A be the adjacency matrixof G. Prove that if G is connected, then every entry in the matrix A^n−1 + A^nis positive.
Module Code: MATH380202
1. (a) Define the terms "strongly stationary" and "weakly stationary".
Let {X} be a stochastic process defined for all t € Z. Assuming that {X+} is
weakly stationary, define the autocorrelation function (acf) Pk, for lag k.
What conditions must a process {X+) satisfy for it to be white noise?
(b) Let N(0, 1) for t€ Z, with the {+} being mutually independent. Which of
the following processes {X+} are weakly stationary for t> 0? Briefly justify your
answers.
i. Xt for all > 0.
ii. Xo~N(0,) and X₁ = 2X+-1+ &t for t > 0.
(c) Provide an expression for estimating the autocovariance function for a sample
X1,..., X believed to be from a weakly stationary process. How is the autocor-
relation function Pk then estimated, and a correlogram (or acf plot) constructed?
(d) Consider the weakly stationary stochastic process ✗+ = + + +-1+ +-2 where
{E} is a white noise process with variance 1. Compute the population autocorre-
lation function Pk for all k = 0, 1, ....
Chapter 10 Solutions
Contemporary Mathematics for Business & Consumers
Ch. 10.I - Find the amount of interest on each of the...Ch. 10.I - Joe Hale goes to a credit union and borrows...Ch. 10.I - Prob. 3TIECh. 10.I - Prob. 4TIECh. 10.I - a. A loan was made on April 4 and had a due date...Ch. 10.I - a. What is the maturity date of a loan taken out...Ch. 10.I - Prob. 1RECh. 10.I - Prob. 2RECh. 10.I - Prob. 3RECh. 10.I - Prob. 4RE
Ch. 10.I - Principal Rate (%) Time Interest...Ch. 10.I - Prob. 6RECh. 10.I - Prob. 7RECh. 10.I - Use the exact interest method (365 days) and the...Ch. 10.I - Prob. 9RECh. 10.I - Prob. 10RECh. 10.I - Prob. 11RECh. 10.I - Prob. 12RECh. 10.I - Prob. 13RECh. 10.I - Use the exact interest method (365 days) and the...Ch. 10.I - Prob. 15RECh. 10.I - Prob. 16RECh. 10.I - Find the amount of interest and the maturity value...Ch. 10.I - Find the amount of interest and the maturity value...Ch. 10.I - Prob. 19RECh. 10.I - Prob. 20RECh. 10.I - Find the amount of interest and the maturity value...Ch. 10.I - Prob. 22RECh. 10.I - Prob. 23RECh. 10.I - Prob. 24RECh. 10.I - Prob. 25RECh. 10.I - Find the maturity value of the following loans....Ch. 10.I - Prob. 27RECh. 10.I - Find the maturity value of the following loans....Ch. 10.I - Prob. 29RECh. 10.I - Prob. 30RECh. 10.I - Prob. 31RECh. 10.I - Prob. 32RECh. 10.I - Prob. 33RECh. 10.I - Prob. 34RECh. 10.I - From the following information, determine the...Ch. 10.I - Prob. 36RECh. 10.I - Prob. 37RECh. 10.I - From the following information, determine the...Ch. 10.I - Prob. 39RECh. 10.I - Prob. 40RECh. 10.I - Prob. 41RECh. 10.I - Solve the following word problems. Round to the...Ch. 10.I - 43. What is the maturity value of a $60,000 loan...Ch. 10.I - 44. Central Auto Parts borrowed $350,000 at ...Ch. 10.I - 45. Emil Benson missed an income tax payment of...Ch. 10.I - 46. At the City National Credit Union, a , $8,000...Ch. 10.I - 47. Kyle Rohrs borrowed $1,080 on June 16 at ...Ch. 10.II - Telex Electronics borrowed money at 9% interest...Ch. 10.II - Prob. 8TIECh. 10.II - Prob. 9TIECh. 10.II - Rita Peterson borrowed $15,000 at 12% ordinary...Ch. 10.II - Prob. 1RECh. 10.II - Compute the principal for the following loans. Use...Ch. 10.II - Prob. 3RECh. 10.II - Prob. 4RECh. 10.II - Prob. 5RECh. 10.II - Prob. 6RECh. 10.II - Prob. 7RECh. 10.II - Prob. 8RECh. 10.II - Prob. 9RECh. 10.II - Prob. 10RECh. 10.II - Prob. 11RECh. 10.II - Prob. 12RECh. 10.II - Prob. 13RECh. 10.II - Prob. 14RECh. 10.II - Prob. 15RECh. 10.II - Prob. 16RECh. 10.II - Prob. 17RECh. 10.II - Prob. 18RECh. 10.II - Use the ordinary interest method to compute the...Ch. 10.II - Use the ordinary interest method to compute the...Ch. 10.II - Prob. 21RECh. 10.II - Prob. 22RECh. 10.II - Calculate the missing information for the...Ch. 10.II - Prob. 24RECh. 10.II - Prob. 25RECh. 10.II - Calculate the missing information for the...Ch. 10.II - Solve the following word problems. Round answers...Ch. 10.II - Solve the following word problems. Round answers...Ch. 10.II - Solve the following word problems. Round answers...Ch. 10.II - Solve the following word problems. Round answers...Ch. 10.II - Prob. 31RECh. 10.II - Solve the following word problems. Round answers...Ch. 10.II - Prob. 33RECh. 10.II - 34. Steve Perry borrowed $10,000 at ordinary...Ch. 10.II - Prob. 35RECh. 10.II - 36. The Mutt Hut Pet Shop borrowed $60,000 on...Ch. 10.II - Prob. 37RECh. 10.III - Erin Lang signed a $20,000 simple discount...Ch. 10.III - What is the effective interest rate of a simple...Ch. 10.III - Legacy Lumber received a $35,000 promissory note...Ch. 10.III - Bob Schuller purchased $10,000 in U.S. Treasury...Ch. 10.III - Calculate the bank discount and proceeds for the...Ch. 10.III - Calculate the bank discount and proceeds for the...Ch. 10.III - Prob. 3RECh. 10.III - Calculate the bank discount and proceeds for the...Ch. 10.III - Prob. 5RECh. 10.III - Prob. 6RECh. 10.III - Prob. 7RECh. 10.III - Prob. 8RECh. 10.III - Using ordinary interest, 360 days, calculate the...Ch. 10.III - Prob. 10RECh. 10.III - Using ordinary interest, 360 days, calculate the...Ch. 10.III - Prob. 12RECh. 10.III - Using ordinary interest, 360 days, calculate the...Ch. 10.III - Prob. 14RECh. 10.III - Prob. 15RECh. 10.III - The following interest-bearing promissory notes...Ch. 10.III - The following interest-bearing promissory notes...Ch. 10.III - Prob. 18RECh. 10.III - The following interest-bearing promissory notes...Ch. 10.III - Prob. 20RECh. 10.III - Prob. 21RECh. 10.III - Calculate the interest, purchase price, and...Ch. 10.III - Calculate the interest, purchase price, and...Ch. 10.III - Prob. 24RECh. 10.III - Prob. 25RECh. 10.III - Use the ordinary interest method, 360 days, to...Ch. 10.III - Boz Foster signed a $10.000 simple discount...Ch. 10.III - Prob. 28RECh. 10.III - Prob. 29RECh. 10 - 1. The price or rental fee charged by a lender to...Ch. 10 - List the three factors that determine the amount...Ch. 10 - Prob. 3CRCh. 10 - The interest calculation method that uses 365 days...Ch. 10 - 5. The interest calculation method that uses 360...Ch. 10 - Prob. 6CRCh. 10 - Prob. 7CRCh. 10 - Prob. 8CRCh. 10 - Prob. 9CRCh. 10 - Prob. 10CRCh. 10 - The amount of money that the borrower receives at...Ch. 10 - 12. The actual interest rate charged on a...Ch. 10 - Prob. 13CRCh. 10 - Prob. 14CRCh. 10 - Prob. 1ATCh. 10 - Prob. 2ATCh. 10 - Prob. 3ATCh. 10 - Prob. 4ATCh. 10 - Prob. 5ATCh. 10 - What is the maturity value of the following loans?...Ch. 10 - Prob. 7ATCh. 10 - Prob. 8ATCh. 10 - Prob. 9ATCh. 10 - Prob. 10ATCh. 10 - Prob. 11ATCh. 10 - Prob. 12ATCh. 10 - Prob. 13ATCh. 10 - Prob. 14ATCh. 10 - Prob. 15ATCh. 10 - Prob. 16ATCh. 10 - Prob. 17ATCh. 10 - Prob. 18ATCh. 10 - Calculate the missing information for the...Ch. 10 - Prob. 20ATCh. 10 - Prob. 21ATCh. 10 - Prob. 22ATCh. 10 - Prob. 23ATCh. 10 - Prob. 24ATCh. 10 - Prob. 25ATCh. 10 - Prob. 26ATCh. 10 - Calculate the interest, purchase price, and...Ch. 10 - Solve the following word problems. Round to the...Ch. 10 - 29. Ronald Brown missed an income tax payment of...Ch. 10 - 30. Katie Chalmers borrowed money from her credit...Ch. 10 - 31. Ryan Roberts took out a loan for $5.880 at the...Ch. 10 - 32. Alicia Eastman deposited $2,000 in a savings...Ch. 10 - 33. Laurie Carron borrowed $16,000 at 14% ordinary...Ch. 10 - 34. Euromart Tile Company borrowed $40,000 on...Ch. 10 - Brandi Lee signed a $30,000 simple discount...Ch. 10 - Varsity Press, a publisher of college textbooks,...Ch. 10 - 37. Fernando Rodriguez purchased $64,000 in U.S....
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