review units

Today, we went over the last few units and got our probability tests back. If you got a low mark, your not the only one. There were quite a few people who got low marks. The last units we did were design and measurement, probability, and applications of periodic functions.

exam review and sinusoidal regression

practice questions for tomorrow:
#18 and #19

Today we did not do mental math, we went over what would be on the exam. We found out what kind of questions, how long, and how many marks there would be for each day.

Then there was announcement over the intercom from mr.barkowski about the accident in winnipeg and let the students know there are counsilors available to talk to if needed.

We went back to the exam, and learned what technology we were allowed to use and which we weren't.

Then we corrected our question from last week about temperatures in winnipeg and we were assigned new homework.

statistics review corrections

Today we skipped mental mathand went straight into correcting questions 2, 9, and 13. We still have time to work on 1-12 from the back of our binomial distribution booklets. Mr.maks recorded our corrections and as well as some new stuff that mr.maks made sure to inform us that around 40% of students BOMB this part on the provincial math exam and there is only about 30% of students from this school writing it... or something like that. SO this is pretty much vital information for us to pass our exams.

Our test is sometime after christmas though!

Don't forget grad hams tomorrow

normal distribution

No mental math today, we started off with learning about
NORMAL DISTRIBUTIONS: Frequency polygons/histograms

check out this website for histograms http://illuminations.nctm.org/activitydetail.aspx?id=78

*created from (theoretically), a histogram situation, with these characteristics(MANY natural phenomena follow a normal distribution)

Characteristics of NORMAL DISTRIBUTION
-theoretical (approximation)
-symmetry aout mean
-follow this rule
68-95-99.7

Another website to check out

www.ronblond.com

ungrouped vs grouped data

9a and 13 a is our homework. We learned about ungrouped vs grouped data.

up till now our examples have been ungrouped (i.e all data values are present and accounted for)

HOW TO PUT GROUPED DATA INTO CALC.

make a frequency table
put the two lists into your calc
stat
calc
1-var stats
l1, l2
ENTER

population standard deviation

Population Standard Deviation

-measure of variability within a data set
-measures how varied the data set is, relative to itself
(How spread out the numbers are)

The formula for finding this would be:

"The square root of the quotient between the sum of all x subtract x bar squared divided by n."

HOMEWORK:

1. Find data
2. Calculate the population standard deviation

mean= x bar

probability test review

Today, all class we went over questions on probability from other tests.
On this test there will be:
"Pathways" Pascal's triangle

F.C.P (fundamental counting principle)
perms and coms

Sample space
(representation)
tree diagram complements

Independent/dependent events
"with replacement"
resetting probability conditions

Mutually inclusive/exclusive

This should be fun!