chapter 1
number or cell phones in a classroom
discrete
how do you calculate relative frequency?
take the total number or frequencies and divide by each frequency to get a decimal
What are these symbols:
μ, σ, M
pop mean, pop st dev, median
Explanatory/ response
level of education/ salary
explan:level of education
Respon: salary
AND(multiple)
multiplication
The % of all students on your campus who have a job is 84.3%
what type of graph:
The rectangles touch each other
histogram
calculator function to find:
Mean, st. dev, Median (Q2)
stat--> calc-->1varstats
explanatory/response:
# of errors/ typing speed
Explan: typing speed
respon: # of errors
OR
P(E)+P(F)-P(E&F)/ grand total
Temperature outside
Interval
What type of graph:
starts at 0 ends at 0
frequency polygon
how can you find your 5 number summary?
1varstats
What is the formula for least squares regression line?
Y(hat)=mx+b
disjoint/ mutually exclusive
no outcomes in common
past-study
case-controlled study
how do you calculate class width
Empirical rule:
what % is the outmost part of a bell shaped curve?
99.7%
What letter in the least squares regression line equation represents Slope?
M
There are 3 blue marbles 4 red marbles and 7 clear marbles in a bag. You take out 2 what is the probability that:
They are both red (w/o replacing)
P(2 red)= 4/ 14 x 3/13 =0.0659
A health teacher wishes to do a research on the weight of college students. She obtains the weights for all the students in her 9 am class by looking at their drivers license or state I.D's
response bias/sampling bias
how do you calculate class midpoint
((1st lcl) + (2nd lcl)/2)).....
How do you calculate a z-score?
What is the calculator function to find the data needed for the equation?
stat-->calc-->#4 linreg
equal
not equal
independent
dependent