Book Definitions
the average of all the data set
mean
y=mx+b
slope of a line
is this discrete or continuous?
The total # of goals scored by a soccer team in a season
Discrete
15-8+5-(-7)
19
What happens when you have 2 or more consecutive absences?
the middle value in a set of numbers
median
z=x-u/SD
z score
what is the mean of the data set?
49,71,42,45,49,71,86,71,78,49
61.1
5 - (-3) + 8 - 15 + 2
3
What do you have to do if you are sick or have an emergency and you cannot attend the PLTL session?
Email the professor with an excuse and CC your PLTL leader
the value that is repeated the most
mode
Q3-Q1
IQR
Box= 1,2,3
Bag=A, B, C
What is the sample space? What is the event of choosing 2?
sample space: A1, A2, A3, B1, B2, B3, C1, C2, C3
Event of choosing 2: A2, B2, B3
15 + 8 + 4 - (-15) - 12 - (-4)
34
What happens if you're constantly on your phone or not doing the work?
You might be marked as absent :(
can assume an infinite number of values between any two specific values. They are obtained by measuring. They often include fractions and decimals.
continuous variable
x=ex/n
mean
Find the standard deviation.
9,18,1,32,10
11.73
3x2 + 6x - 3
when x = 3
42
After how many minutes will you be considered absent if you're not in class?
After 10 minutes!
used to display the distribution of a dataset
box and whisker plot
P(A&B) =P(A) . P(B)
multiplication rule for probability
Not all visitors to a certain company's website are customers. In fact, the website administrator estimates that about 5% of all visitors to the website are looking for other websites. Assuming that this estimate is correct, find the probability that, in a random sample of 5 visitors to the website, exactly 2 actually are looking for the website.
Round your response to at least three decimal places.
0.001
At the beginning of the month, your account balance was $94. During the month, you deposited $562 and wrote a check for $474. What was your balance at the end of the month?
182
What's your PLTL Leader's name?
Sophia Mar :)