Tut 3-1 part II

We decided that today was a no - blog day. (for a couple of reasons) One being that Shawn said he would blog but did not. SO now he has to do 2 days in a row. He can do Monday's lesson on RRSP's. Thanks Shawn!!!

Personal Finance - Oct. 28th

Today's class was a continuation of the subject Personal Finance! Yay! (haha)

We learnt the following: :)

TSX: Toronto Stock Exchange

TVM: Time Value Of Money

-You can access the Financial part of your graphing calculator by prressing "2nd function" then "x-1"(finance) on a regular TI-83 graphing calculator. We were then introduced to the following terms:

N= Total # of payments I%= Annual Interest rate as a percent

PV= Present Value PMT= Payment each period

FV= Future Value P/Y= # of Payments a Year

C/Y= # of Compounding periods a Year

Annual= 1 time a year

Semi-Annual= 2 times a year or every 6 months

Quarterly= 4 times a year or every 3 months

Monthly= 12 times a year or every month

Daily= 365 times a year or everyday

~Rule Of 72= Time for your interest to double.

Ex: At 8%, 72/8 = 9. meaning it will take 9 years for your money to double.

*After going over a few examples and practice questions, we were then assigned to try

Tutorial # 4.1, Page.152, # 2,6.*

*~Desiree Rantala

free cars

who wants free cars?
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Gaining confidince

The main rule for todays class on confidince intervals is the 95% confidince interval and margin of error. To find the confidince interval first you must find meu (average) and the standerd divation ( the square root of n*p*(1-p)). To find 95% interval times the standerd divation by 1.96 and add and minus it from the average. The margen of error is what you add or minus from the average to get the 95% interval. To find the percent margen of error just find the pecent with with the margen of error.

Tutorial 3.5

Today we learned how to do a Normal Approximation To A Binomial Distribution.
If npq is bigger than 10 we use Shade Norm of Invert Norm for a binomial distribution.
If npq is less than 10 we use binompdf.
n= number of trials p= probability of success q= probability of failure

STEPS:
1) find npq
2) check if npq is greater than 10
(if yes) (if no)
3) find mean 3) binompdf (n,p) store in L2
4) calc. z scores 4) fill down L1
5) shade Norm 5) answer question

SHADE NORM / INVERT NORM

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Invert norm: find raw score, mean or standard deviation.
given % ------> Z-score

Opposite to Shade norm (shade norm finds the %)
Given Z - score ------> %

invert norm (0.84) = 84% -----> Z = .99
.99 is the Z score that cuts off the bottom 84%
Invert norm gives the Z score that gives % to the left of the Z score.

**** ASK % or PROBABILITY = SHADE NORM****
**** GIVES YOU % ASKING RAW SCORE = INVERT NORM****

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Is This For Real?

Basically, Yes.