stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Statistics Flashcards | StudBud
Explore
/
Statistics
Statistics
19 terms
·
StudBud Administration
·
17 plays
Normal Distributions, populations, samples, hypotheses and collecting Data
Flashcards
19 cards
F
Practice quiz
P
Host live
L
Questions
19
Answers
1
This data is skewed...
left
symmetrical
right
To the mean
2
Define the sample:
978 consumers in US
1222 consumers surveyed in US
978/1222 (80%) prefer credit/debit as primary payment method
All consumers in US
3
Mean = 100, SD = 12.67. Find the z-score that corresponds to the score 79.
1.66
-1.66
-1.23
71.01
4
On the z chart the shading always shades...
From the left
From the right
In the middle
From the outside
5
Standing in line for the theatre and the manager asks every 6th person their opinion would be what sampling method?
Self-selected
Systematic
Stratified
Convenience
6
A parameter in statistics is:
Variable specific
Characteristic of a population
Determined by the sample
Derived from data
7
Define the population:
All consumers in US
978 consumers in US
978/1222 (80%) prefer credit/debit as primary payment method
1222 consumers surveyed in US
8
What is the
standard deviation
of the following Normal Distribution curve?
6
7
5
42
9
Every 3rd person who enters an athletic event is asked whether he/she supports the use of instant replay.
This is biased because only those with strong opinion will respond
This is biased because every other person should have been asked
This is a good sample that represents the population
This is based because it does not include people who do not attend events.
10
From the drawing estimate the % that is shaded.
82%
95%
24%
75%
11
This data is skewed...
symmetrically
right
left
I don't have any idea
12
When student council goes around TKA and asks 3 random people from each homeroom, they are doing what sampling method?
Systematic
Stratified
Random
Cluster
13
Mean = 0, SD = 1. Find the probability that a score is less than 1.05. (use z-chart in notes packet p5)
68%
93%
14%
86%
14
What is the probability between two standard deviations?
50%
99%
95%
68%
15
P\left(x\leμ+σ\right)
34%
84%
68%
16%
16
Self-selected and convenience are the most biased sampling methods, but which method is the next biased?
Stratified
Systematic
Random
Cluster
17
"Do you favor government funding to help prevent acid rain?"
Not biased - reponses will accurately reflect opinions being surveyed
Biased because people may not respond truthfully
Biased because it encourages a particular response
Biased because not enough information is given to give an accurate response
18
When you will out an anonymous survey and send it back, you are participating in what sampling method
Self-selected
Stratified
Random
Convenience
19
Describe the sample:
978/1222 (80%) prefer credit/debit as primary payment method
All consumers in US
1222 consumers surveyed in US
978 consumers in US
