Answers
MATH215 - Assignment 4 - 100%
Assignment 4 from BIOL 235 2018 at Athabasca University with a grade of 100%. What's an A worth to you? Get the A to raise or keep your GPA at 4.0.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Content preview
Assignment 4ATotal Marks = s
Please show all your work. Some questions require you to use graphs, tree
diagrams, fornmlas. and so on that are difficult or impossible to reproduce
in word-pl'O('essing programs, so you will have to print the entire
assignment and fill it out and mail it to your tutor. As an alternative to
mailing. you might be able to photograph or scan your assignment and
submit it through the appropriate drop box. If you do, make sure the
material you are submitting is legible.
Question 1
Grade point aYerages of math majors at a large distance education
uniYersity are normally distributed with a mean of µ =2.85 and a standard
de,iation of a-= 0.30 . If a random sample of 25 math majors is selected
from that university, what is the probability that the sample mean grade
point aYerage , ...;n be
6marks a. either less than 2.709 or more than 2.955?
3marks b . at least 2.757?
:\
C (T -
s IJ\:: 2 5 - -cr-
~-µ
r ( x < 2 101 ~ n : < - 2. s)
6 30
1r Tis-=
Ox -c : (),00~4
s o.Ob
f( x_> : .9S'j') : ?C z> l,75 )
~ I - 0.154"'
:: 0,()_;\0'
2. 7S7 - 2 is
~ C 215 D 0~
: - \.S5 r cK ~ 1.757) -= r c ~ -1. ss')
2
trx : oo~ = \ - o o60b
u : 0 ~o :: ( ~3~4
Y\· 25
- I ~5
Introduction to Statistics
1
, Question 2
Psychologists estimate that 80% of male drivers, when lost in trying to find
a location, continue to drive rather than asking for directions. If this
estimate is correct, what is the probability that, in a random sample of 100
lost male drivers, the proportion who continue to drive is
4 marks a. at least 0 .70?
3 marks b. less than 0 .85?
"') P" oia t : o 2.0 V'\ =100
: r1f ~ ..ro.~Q,1 :: Q. 04
),,, ~ -V~ U
X
!Oll
Q GO(,Z ~
" 0
'
P(~ > 0.10., p(z ?. O.7D - 0.t ): f (-z ?_ -2.S) -= \ - 0.1~31
0.04
Q 5p 0
0.0~
0
fC~ < o.\SJ : P(z< o_J50.0
0
- } J=P(.:: <1.1s = o.~i44
2
Mathematics 215 / Assignment 4A
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller JaneNguyen. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$29.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
84866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now