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Test your basic knowledge |
DSST Intro To Statistics
Start Test
Study First
Subjects
:
dsst
,
statistics
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. An individual data value which lies far (above or below) from most or all of the other data values within a distribution
H0
Outlier
Disjoint event
Range
2. Determine the location of the middle value of all the data values
Numerical Variable
Population
Center of Distribution
The effect of extreme values on the measures of center
3. Collection of information from the whole population
Pictograph
Disjoint event
Census
Stem and leaf plots
4. Always use a equal symbol
x
What symbol must always be found in H0
Strata sampling
Relative frequency histogram
5. Using graphs and numerical summaries to describe variables in a data set and their relationship
Exploratory data analysis
range
Symmetric Distribution
P(A)
6. A sample which is selected in such a manner - that each data value of the population has a non-zero probability of being selected for the sample
Nominal
Observational study
Random Sample or Probability Sample
p
7. Mean - mode - median and midrange.
Categorical Variable
q
Alpha (a)
The 4 measures of center
8. A method of data collection in which the objects of study are observed in their natural settings and the variables are recorded
Strata sampling
Population
Observational study
Range
9. Uses numerical and or visual techniques to summarize or describe the data in a clear effective manner
p value left tail
Descriptive Statistics
Ordinal
Sample Variance
10. Parameter
Exploratory data analysis
Numerical measurement describing some characteristics of a population.
Frequency
Dependent events
11. A subset of the population- it's important to choose a sample at random to avoid bias in the results
Simple random sample
Parameter
Frequency
Sample
12. Is a sample containing similar characteristics of the population
Symmetric Distribution
The 2 measures of relative standing
The effect of extreme values on the measures of center
Representative Sample
13. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.
Outlier
Range
Stem and leaf plots
x
14. Information about individuals in a population
Characteristic of a distribution
Continuous Data
Data
Cluster sampling
15. A flaw in the sampling procedure that makes it more likely that the sample will NOT be representative of population
Bias
Percentile
x
Ratio
16. Test use normalcdf(ZTS -999)
Dot plots
p value right tail
Census
Disjoint event
17. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.
P(A)
Convenience sampling
Ordinal
Percentile
18. Disjoint events cannot overlap. They are mutually exclusive if they cannot occur at the same time.
Data
Disjoint event
Statistic (note there is no 's' at the end)
x
19. Sample proportion
Dot plots
Sampling
p
Population
20. Sample mean
The 4 measures of center
Alpha (a)
Graph
x
21. A numerical quantity measuring some aspect of the population
Parameter
Stem-and-Leaf display
S
22. Occur when one of them affects the probability of the other.
Dependent events
Survey
Interval
Representative Sample
23. Middle value of a set of data values after they've been arranged in numerical order - 1. First arrange data values in numerical order 2. For odd # of data values - the median is the middle data value 3. For even # of data values - the median is the m
Statistics
Nominal
Median
Continuous Data
24. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).
Relative frequency histogram
Interval
range
p
25. Standard scores and percentile
s2
Representative Sample
The 2 measures of relative standing
Census
26. Sample variance
Descriptive Statistics
s2
Survey
Statistic
27. The pattern of variation of data. The distribution may be described as symmetrical - positively skewed - or negatively skewed
Sample
Distribution
Observational study
Convenience sampling
28. Null hypothesis
Data
H0
Independent events
The 4 measures of center
29. To divide the population into 2 or more non-overlapping subsets called strata
Parameter
Strata sampling
Representative Sample
Nominal
30. The variable value can be represented as isolated points on a number line
Relative frequency histogram
Self-selected sample
Discrete numerical data
Census
31. Is a sample that has the pertinent characteristics of the population in the same proportion - as they are included in that population
Representative Sample
p value two tailed test
s
Strata sampling
32. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION
Independent events
Census
Inferential Statistics
Alpha (a)
33. One extreme value can affect it dramatically.
n
Sample
Numerical measurement describing some characteristic of a sample.
The effect of extreme values on the measures of center
34. Graph involving pictures of objects in which the size of the object in which the size of the object in the picture represents the relative size of the quantity being represented by the object.
Data
Pictograph
x
Distribution
35. Is a collection of several data pertaining to one or more variables
Outlier
Numerical measurement describing some characteristics of a population.
Raw Data
Data Set
36. Sample size or number of trials
n
Population Size
Population
What symbol must always be found in H0
37. Type of information - usually a property of characteristic of a person or thing that is measured or observed
n
p
Discrete numerical data
Variable
38. Occur when one does not affect the probability of the occurrence of the other.
s
Ordinal
Census
Independent events
39. _______________ of a numerical variable represents the data values of the variable from the lowest to the highest value along with the number of times each data value occurs
N
The 3 measures of variation
Distribution
Representative Sample
40. The number of times each data value occurs
Numerical Variable
Relative frequency histogram
Frequency
41. Is the portion of the population that is selected for study
Sample
Descriptive Statistics
Parameter
H0
42. Members of the population select themselves by volunteering
Data Set
Independent events
Parameter
Self-selected sample
43. Sum of the values
Dependent events
S x
Sample
Representative Sample
44. Probability of event A
Designed experiment
What symbol must always be found in H0
P(A)
Alpha (a)
45. Population size
N
What symbol must always be found in H0
Ratio
Relative frequency histogram
46. Alternative hypothesis
Categorical Variable
H1
Data Set
Representative Sample
47. Sample standard deviation
x
Distribution
s
Convenience sampling
48. (largest data value) - (smallest data value)
Exploratory data analysis
Survey
range
Interval
49. Range - standard deviation and variance.
Pictograph
Discrete Data
The 3 measures of variation
Population
50. Collection of information from a sample
Numerical Variable
Survey
Distribution
S x