Question

A two-way frequency table shows grades for students in college and students in high school:

High school College Total
GPA above 3.0 14 26 40
GPA below 3.0 46 14 60
60 40 100


Based on this data, are "being in high school" and "GPA above 3.0" independent events?
Yes, P(high school | GPA above 3.0) = P(high school)
Yes, P(high school | GPA above 3.0) = P(GPA above 3.0)
No, P(high school | GPA above 3.0) ≠ P(high school)
No, P(high school | GPA above 3.0) ≠ P(GPA above 3.0)
@satellite73

Answer 1

hi

Answer 2

hello friend :)

Answer 3

let me get on a real computer so i can look more carefully at the question

Answer 4

hahah okay

Answer 5

\[p(high~school)=\frac{14}{100}=.14\]right?

Answer 6

which one? @satellite73

Answer 7

oh no that is not right, it is hard for me to read the table
the total number of people in high school is 60 the way i read it

Answer 8

and the total all together is 100 to the probability of high school is \(\frac{60}{100}=0.6\)

Answer 9

High school College Total
GPA above 3.0 14 26 40
GPA below 3.0 46 14 60
60 40 100

Answer 10

then the number of people with GPA over 3.0 is 40
of those, 14 are in high school so
\[p(high~school|gpa>3.0)=\frac{14}{40}\]

Answer 11

so the answer is B?

Answer 12

or A?

Answer 13

and since \[\frac{14}{40}\neq \frac{60}{100}\] the events are Depenedent

Answer 14

they are not the same, so C

Answer 15

oh thx

Answer 16

your welcome

Answer 17

oops i mean "you're welcome"

Answer 18

hahaha it's fine.

Answer 19

A political candidate wanted to understand what issues were important to their voters. They asked 1,999 voters, "Which issue is the most important: crime, city planning, or health care?" The results of the survey are shown in the two-way table below:


Crime City Planning Health Care
Male 118 239 458
Female 418 317 449


What is the probability that a person chosen at random from this survey is concerned about crime, given that they are male? Round your answer to the nearest tenth.
5.9%
14.5%
22.0%
26.8%
@satellite73

Answer 20

total male is 458 right?

Answer 21

of those 118 concerned about crime, so
\[118\div 458\]

Answer 22

.26

Answer 23

wait i dont get any of those answers

Answer 24

crap maybe i am reading the table wrong
i get like 25.7

Answer 25

well i don't know what else to do

Answer 26

so it would be D cuz the question asks "round your answer to the nearest tenth"

Answer 27

should be 25.8 in that case

Answer 28

not26.8

Answer 29

but D is the closest

Answer 30

oh let me send u a good table

Answer 31

screen shot?

Answer 32

Crime City Planning Health Care
Male 118 239 458
Female 418 317 449
@satellite73

Answer 33

yeah i thought so, still 118/458

Answer 34

pick D i guess

Answer 35

ok

Answer 36

i got it wrong i got a 60% on the assignment

Answer 37

hmmm

Answer 38

i am sticking with my answer on that one
do you have to do it again?

Answer 39

its up to me but i wanna do it again cuz im not happy with the grade.

Answer 40

you are a worker

Answer 41

hahah thx i guess.

Answer 42

A compact disc is designed to last an average of 4 years with a standard deviation of 0.9 years. What is the probability that a CD will last less than 3 years?

1.11%
13.35%
86.65%
100%
@satellite73

Answer 43

oh my

Answer 44

you need some kind of calculator or table for this, you can't do this in your head
but it is probably the second one, but maybe the first
let me see if i can google a normal curve calculator

Answer 45

so u cant do this?

Answer 46

sure i can, but i need a table of some kind or a calculator
give me a second i think i have one

Answer 47

alrighty

Answer 48

http://stattrek.com/online-calculator/normal.aspx

Answer 49

is 13.3% an answer

Answer 50

yeah it is B
like i said, you need a calculator

Answer 51

okay thank you sir i appreciate it sir god bless ya sir i need to stop something is wrong with me okay bye sir LOL

Answer 52

more sir's than i have had in all my life
good luck with the rest of it

Answer 53

hahahha no sir i still have more i think so dont escape sir.

Answer 54

ok i will be here watching the man from uncle on tv
holla if you need help

Answer 55

i will hollaaa!! xD