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Statistics
Statistics
30 terms
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StudBud Administration
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19 plays
To know about statistics
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
A hypothesis must be ______________.
tested
written in caps
a question
1000 words and double spaced
2
Predictive statistics
uses assumptions from data to explain a phenomenon
describe a population from a data set
uses visual representations to show trends in data
tries to use current data to predict future events
3
What does this symbol mean?
sample size
population mean
standard deviation of the population
sample mean
4
What does this symbol mean?
standard deviation of the population
critical value
sample mean
degrees of freedom
5
Inferential statistics help you do which of the following?
organize data
draw conclusions about a population
describe data
display data
6
T/F: Inferential statistics are used to draw conclusions beyond the set of data obtained
False
True
7
Calculate the sample mean
7
8
5
35
8
Estimate the population in 2010
23,000
25,000
22,500
24,000
9
Ho is true, Ho was reject.
type I error
1-P(type II error)
1-P(type I error)
type II error
10
Descriptive statistics consists of methods of organizing, summarizing and presenting data in an informative way.
False
True
11
What does an alternate hypothesis tell us?
There is a difference.
There is a correlation.
There is a difference or a correlation.
There is no difference or correlation.
12
Statistics is a science of:
all of the above
organizing data
analyzing data
collecting data
13
Descriptive statistics
quantitatively summarise features of a collection of information.
Strategies used to analyse the characteristics of a resource.
Analysis which converts qualitative data into quantitative data.
measuring, or measured by the quantity of something.
14
Statistics are .............. evidence
Classified
Electrified
Mummified
Quantified
15
What is statistics about?
analyzing graphs
interpreting data
organizing data
all of the above
16
A hypothesis
can be correct
is always correct
is a theory
can be wrong
17
Definition of population density:
Small amount of people in a large area
A lot of people in a small space
Small amount of people in a small area
The amount of people in a certain area
18
Descriptive statistics
uses visual representations to show trends in data
describe a population from a data set
uses assumptions from data to explain a phenomenon
tries to use current data to predict future events
19
What is the symbol for population mean?
π (pi)
∑ (sigma)
"ex bar"
μ (mu)
20
what does median mean
all the information that´s in the median
the middle value in the lists of numbers
21
What's the null hypothesis?
μd = 0
μd < 0
μd ≠ 0
μd > 0
22
statistics and probability
4
1
3
2
23
What part of the statistics is responsible of examine if variables are associated?
Inferential
Probability
Descriptive
24
Inferential statistics means to...
Make a judgement or give meaning to results
Analyse results
Create a bar chart
Infer something about results
25
What part of the statistics is responsible for examine trends or distributions?
Inferential
Descriptive
Probability
None of above
26
what is mean
the average of numbers calculated ¨central¨
the value that divides a list of numbers in quarters
27
How old is Mr. Smith
46
42
40
44
28
What are statistics?
The study of data
The study of numbers
The study of math
The study of probability
29
What is the mean number?
(C)
(D)
(B)
(A)
30
The Null hypothesis is...
Hypothesis that there is no significant difference
A variable
Hypothesis that there is a significant difference
A statistical test
