× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
newbuddy newbuddy
wrote...
Posts: 356
Rep: 0 0
6 years ago
Which of the following statements is always true for any two events A and B defined on a sample space S?
 
  A) The complement of event A is event B.
  B) The intersection of A and B is the set of all basic outcomes in either A or B.
  C) If events A and B are mutually exclusive, then A  B = S.
  D) If events A and B are collectively exhaustive, then A  B = S.

Q. 2

The covariance of the following sample data of four (X, Y) pairs: (1, 5 ), (2, 10 ), (4, 7 ), and (5, 9 ) equals:
 
  A) 1.25
  B) 2.50
  C) 3.75
  D) 3.69

Q. 3

Anita collected a data set on the weights (to the nearest pounds) of all students at her university. The best graph to describe this data is a:
 
  A) histogram
  B) pie chart
  C) bar chart
  D) scatter plot

Q. 4

For any distribution, the percent of observations that lie within four standard deviations of the mean is:
 
  A) 93.75 or more.
  B) 93.75 or less.
  C) 6.25 or more.
  D) 6.25 or less.

Q. 5

Which of the following statements about a pie chart is false?
 
  A) A pie chart is graphical representation of the proportion or percentage of frequency of each category of a categorical variable.
  B) A pie chart is usually used to display the relative sizes of categories of a numerical variable.
  C) A pie chart always has the shape of a circle.
  D) The size of each slice of a pie chart is the proportion or percentage of frequency of the corresponding category of a categorical variable.

Q. 6

Suppose you roll a pair of dice. Let A be the event that you roll an even number. Let B be the event that you roll an odd number. Which of the following statements is true?
 
  A) The events A and B are not mutually exclusive.
  B) The intersection of A and B is the empty set .
  C) The events A and B are not collectively exhaustive.
  D) The complement of event B is the set 1, 3, 5, 7, 9, 11.
Read 29 times
2 Replies
Replies
Answer verified by a subject expert
mkhoudsmkhouds
wrote...
Posts: 220
Rep: 0 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

newbuddy Author
wrote...
6 years ago
Above and beyond my expectations for this site
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  922 People Browsing
Related Images
  
 245
  
 261
  
 413
Your Opinion
Who's your favorite biologist?
Votes: 585