DOC PREVIEW
TAMU MATH 141 - 141wir10_11c

This preview shows page 1-2 out of 6 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 6 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 6 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 6 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

cKathryn Bollinger and Benjamin Aurispa, November 28, 2011 1Week-In-Review #10 (8.5, 8.6, 5.1)1. Let Z be the standard normal random variable. Calculate the following probabilities:(a) P (−2 ≤ Z < 0.22)(b) P (Z ≤ 1.75)(c) P (Z > −0.35)2. Let Z be the standard normal random variable. Find a such that(a) P (Z < a) = 0.8158(b) P (Z > a) = 0.3257(c) P (−a < Z < a) = 0.6102cKathryn Bollinger and Benjamin Aurispa, November 28, 2011 23. Let X be a normal random variable with µ = 260 and σ = 35. Find each of the following.(a) P (X < 200)(b) P (X ≥ 180)(c) The value of a such that P (260 < X < a) = 0.22(d) The values of a and b such that P (a < X < b) = 0.4198 if a and b are symmetric about the mean.cKathryn Bollinger and Benjamin Aurispa, November 28, 2011 34. Sup pose weights of bags of snack mix are normally distributed with a mean of 10 ounces and a standarddeviation of 0.6 ounces. What is the probability that a bag selected at r an dom weighs(a) Between 9.5 and 11 ounces?(b) At least 9 ounces?(c) Less than 8.5 ounces?5. A study finds that the lifespan of phone b atteries are normally d istributed with a mean of 2 years and astandard deviation of 1.5 months.(a) What is the probability that a phone battery will have a lifespan between 22 and 26 months?(b) What battery lifespan corr esponds to the 95thpercentile?cKathryn Bollinger and Benjamin Aurispa, November 28, 2011 46. Find the amount of money at the end of 5 years on a $200 deposit in an account paying simple interest ata rate of 4.75% per year. How much interest is earned?7. A bank deposit paying simple interest grew from an initial sum of $2000 to a sum of $2150 in 7 months.Find the interest rate.8. How much money will be in an account after 2 years on a $500 deposit that earns interest at a rate of 5%per year compounded continuously?9. If Mark invests $5000 into an account paying interest at a r ate of 8% per year compounded m onthly, howmuch money will he have at the end of 5 years (assuming n o add itional deposits or withdrawals)?cKathryn Bollinger and Benjamin Aurispa, November 28, 2011 510. In 18 months Brian needs $1750 in order to buy a specific computer. If he finds an account paying interestat a rate of 5.95% per year compounded weekly, how much could he invest now in order to have the moneyhe n eeds for the computer?11. Kevin inherits $50,000. If he invests it by placing it into an account paying interest at a rate of 10.5%per year compounded monthly, how long would he have to leave his money in the account before having$100,000?12. What interest rate, compounded daily, will quadruple $1200 after 5 years?13. A major credit card company has a finance charge of 1.5% per month on the outstand ing indebtedness.Susie charged $1000 and did not pay her bill for 6 months. What is the bill after the 6 months?cKathryn Bollinger and Benjamin Aurispa, November 28, 2011 614. Which account would be a better account for an investment? For a credit card?OPTION A: 9% per year, compounded monthlyOPTION B: 8.8% per year, compound ed d ailyOPTION C: 8.9% per year, compounded continuously15. Determine whether the following s tatements are True or False.(a) A normal curve with a higher variance is taller than one with a lower variance.(b) In a normal distribution, approximately 99.73% of the data lies fur ther than 3 standard deviations fromthe mean.(c) A normal random variable with a mean of zero is the standard normal curve.(d) The m ore times a year an account is compounded, the more interest that is


View Full Document

TAMU MATH 141 - 141wir10_11c

Documents in this Course
253fa

253fa

2 pages

253e3a

253e3a

2 pages

141wir5

141wir5

3 pages

wir5b

wir5b

4 pages

e1ques

e1ques

3 pages

ch08-3

ch08-3

2 pages

ch08-3

ch08-3

2 pages

lab2

lab2

2 pages

wir7b

wir7b

6 pages

ch8

ch8

7 pages

Lines

Lines

2 pages

ch06-2

ch06-2

2 pages

chap7

chap7

11 pages

ch7

ch7

7 pages

ch02-1

ch02-1

2 pages

e3ques

e3ques

3 pages

141wir6

141wir6

3 pages

Load more
Download 141wir10_11c
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view 141wir10_11c and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view 141wir10_11c 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?