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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. Null hypothesis
Self-selected sample
Frequency
Skewed Distribution
H0
2. A descriptive tool used to visually describe the characteristics and relationships of collections of data quickly and attractively
Survey
Bias
Graph
Dependent events
3. Is denoted by 'n' - is the number of data values in the sample
Parameter
Categorical Variable
Sample Size
p value left tail
4. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.
Nominal
Population
Frequency histogram
Statistic
5. Statistics
Observational study
Numerical measurement describing some characteristic of a sample.
Stem and leaf plots
Relative frequency histogram
6. A method of experimentation in which you can control as many variables as possible in order to isolate the effects of a response variable
Graph
Range
Continuous Data
Designed experiment
7. Occur when one does not affect the probability of the occurrence of the other.
Self-selected sample
p value right tail
Independent events
Sample Size
8. Square the standard deviation and to find the population variance square of the population standard deviation
Dot plots
p value right tail
Sample Variance
Variable
9. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION
Bias
Inferential Statistics
Survey
Strata sampling
10. Determine the location of the middle value of all the data values
Disjoint event
Center of Distribution
p
S
11. Occur when one of them affects the probability of the other.
Dependent events
p value right tail
Outlier
Designed experiment
12. The variable value can be represented as isolated points on a number line
q
x
Discrete numerical data
s2
13. Collection of information from a sample
Dependent events
Skewed Distribution
Survey
s
14. Involves the procedures associated with the data collection process - the summarizing and interpretation of data - and the drawing of inferences or conclusions based on the analysis of the data
Dot plots
Percentile
Statistics
Population Size
15. The important aspects of the data are called?
Pictograph
Frequency histogram
Characteristic of a distribution
p
16. Variable where the value is a number that results from a measurement process - also called numerical data
Disjoint event
s2
Numerical Variable
s
17. When the distribution of the data values greater than the center of the display - and the data values less than the center of the display are mirror images of each other
Symmetric Distribution
Sample Variance
Variable
Discrete numerical data
18. _______________ are numerical measurements that can assume any value between two numbers
Frequency histogram
Continuous Data
s
Census
19. A method of data collection where the researcher selects a sample from the population and measures the variable of interest
Survey
Independent events
Numerical measurement describing some characteristic of a sample.
Variable
20. Population size
Simple random sample
Graph
Statistic (note there is no 's' at the end)
N
21. Double the answer from step 1 or step 2 (on whichever side your test statistics falls).
p value two tailed test
Population Size
What symbol must always be found in H0
Frequency histogram
22. Is a number that describes a characteristic of a sample
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23. Uses numerical and or visual techniques to summarize or describe the data in a clear effective manner
The effect of extreme values on the measures of center
Characteristic of a distribution
Descriptive Statistics
Numerical Variable
24. A quantity calculated from data gathered from a sample- usually used to estimate a population parameter
Stem-and-Leaf display
Categorical Variable
Statistic
Relative frequency histogram
25. Is denoted by 'N' - is the number of data values in the population
Variable
Census
Survey
Population Size
26. A numerical quantity measuring some aspect of the population
S x
Statistic
Parameter
27. A method in which each combination of people has an equal chance of being selected- the sample is representative of the population and is independent
Discrete numerical data
p
Simple random sample
Stem-and-Leaf display
28. Create a sample by using data from population members that are readily available
Census
Convenience sampling
Percentile
Characteristic of a distribution
29. Level of measurement- Involves data that may be arranged in some order - but differences between data values either cannot be determined or are meaningless. (Example) Questions on a survey are scored with integers 1 thru 5 with 1 representing strong
Sample Variance
Ordinal
Frequency
Representative Sample
30. Alternative hypothesis
range
Representative Sample
Statistics
H1
31. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.
Percentile
Discrete Data
Simple Random Sample
Statistics
32. Mu; population mean
Frequency
S x
Interval
33. Is a sample containing similar characteristics of the population
Representative Sample
Simple random sample
The 4 measures of center
Population Size
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.
Pictograph
Strata sampling
Sample Variance
p value right tail
35. _______________ are numerical values that can assume only a limited number of values
Discrete Data
s
Descriptive Statistics
range
36. Probability of event A
Median
Exploratory data analysis
Statistic
P(A)
37. Always use a equal symbol
What symbol must always be found in H0
Representative Sample
The 3 measures of variation
Raw Data
38. Is a collection of several data pertaining to one or more variables
Self-selected sample
Data Set
Survey
p
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
Distribution
p value two tailed test
Graph
40. Disjoint events cannot overlap. They are mutually exclusive if they cannot occur at the same time.
Center of Distribution
Random Sample or Probability Sample
The 2 measures of relative standing
Disjoint event
41. When the distribution of the data values tend to be concentrated toward one end of the display or tail of the distribution - while the data values in the other tail are spread out through extreme values resulting in a longer tail
Representative Sample
Nominal
Skewed Distribution
42. The pattern of variation of data. The distribution may be described as symmetrical - positively skewed - or negatively skewed
Representative Sample
Distribution
Ratio
Dependent events
43. Population variance
Categorical Variable
Descriptive Statistics
s2
Raw Data
44. Population proportion
Parameter
q
Convenience sampling
p
45. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error
Outliers
Sampling
Frequency histogram
Numerical Variable
46. Standard scores and percentile
The 2 measures of relative standing
Bias
The 3 measures of variation
Statistic (note there is no 's' at the end)
47. Type of bar graph that shows frequency distributions
Numerical measurement describing some characteristics of a population.
Frequency histogram
Sampling
S
48. Mean - mode - median and midrange.
Parameter
The 4 measures of center
Sample
p value two tailed test
49. Sample proportion
Dot plots
Designed experiment
Numerical measurement describing some characteristic of a sample.
p
50. Is a number that describes a characteristic of a population
The 3 measures of variation
Numerical measurement describing some characteristic of a sample.
s
Parameter