Exam (elaborations)
Learning stats for new years at university
- Course
- Institution
- Book
This document will help you to revise your module since it is a revision textbook and It touches every thing from probabilities onward
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
Complete WEEK2 note: Machine Learning & Learning Algorithms(BM05BAM)
-
Data Mining introduction into R + solutions exercices (introduction)
-
Readings for Analytics in Accounting & Financial Management
Seller
Follow
qiningcobo547
Content preview
Question 1Suppose an experiment is performed in which a coin is flipped 4 times. The resulting sample
space is
S = { hhhh, hhht, hhth, hthh, thhh, hhtt, htht, thht, htth, thth, tthh, ttth, ttht, thtt, httt, tttt }
Event A is defined as follows:
A = { hhtt, htht, thht, htth, thth, tthh, ttth, ttht, thtt, httt, tttt }
Event A can be expressed in words as “the event that
a) more than 1 tail is obtained”
b) less than 3 tails are obtained”
c) more than 2 heads are obtained”
d) less than 2 heads are obtained”
e) equal numbers of heads and tails are obtained”
Questions 2 and 3 are based on the following information:
Suppose a certain trait is associated with eye colour. Three hundred (300) people were
randomly selected and their eye colour and the absence/presence of the trait was recorded.
The number of people in each category is given in the table below.
Eye Colour
Blue Brown Other
Present 70 30 20
Trait
Absent 20 110 50
Question 2
What are the odds against randomly selecting a person who has brown eyes but does not
have the trait?
a) 1: 0.467
b) 1: 3.666
c) 1: 0.7857
d) 1: 0.214
e) 1: 0.3666
Question 3
, The odds against a person having the trait are
a) 1 : 1.5
b) 1 : 2.5
c) 1 : 1.6667
d) 1 : 0.6667
e) None of the above
Question 4
Which of the following statements best interprets the odds of passing Math 130 being 2 to
1?
a) There is a 2% chance of passing Math 130.
b) There is a 50% chance of passing Math 130.
c) For every 3 students, 2 are likely to pass Math 130.
d) There is a 67% chance of passing Math 130.
e) Twice as many students are expected to fail Math 130 as those who pass
Question 5
Suppose A and B are events such that P ( A ) >0 and P ( B )> 0. Events A and B are
independent if
a) P ( A )=P ( B )
b) P ( A ∩B )=0
c) P ( A ) + P ( B )=1
d) P ( B ) P ( A∨B ) =0
e) P ( A ∩B )=P ( A ) P ( B )
Question 6
Busi does not like going to the doctor so she will only go to the doctor 15% of the times that
she gets sick. If Busi goes to the doctor, there is an 85% chance that she will be given
antibiotics. What is the probability that next time Busi gets sick, she will go to the doctor
and will be given antibiotics?
a) 0.7
b) 0.1275
c) 1
d) 0.5667
e) 0.7225
Question 7
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 qiningcobo547. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.32. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now