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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. Sample proportion
Simple Random Sample
Census
Population Size
p
2. Sample size or number of trials
Convenience sampling
Center of Distribution
n
Dot plots
3. To find the range subtract the lowest value by the highest value.
Parameter
Range
s2
s
4. The variable value can be represented as isolated points on a number line
Numerical Variable
n
Discrete numerical data
Designed experiment
5. Members of the population select themselves by volunteering
Self-selected sample
The effect of extreme values on the measures of center
Designed experiment
Stem and leaf plots
6. Parameter
Discrete Data
Numerical measurement describing some characteristics of a population.
Graph
Disjoint event
7. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies
Relative frequency histogram
n
Systematic sampling
Independent events
8. A numerical quantity measuring some aspect of the population
Parameter
The 3 measures of variation
Interval
Discrete Data
9. Before they are arranged or analyzed - information or observations are called________.
Continuous Data
Inferential Statistics
Dependent events
Raw Data
10. A collection of individuals about which we want to draw conclusions
Outlier
N
Population
What symbol must always be found in H0
11. 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
Range
Ratio
Simple random sample
Parameter
12. 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
Survey
p value right tail
Median
Inferential Statistics
13. Is a number that describes a characteristic of a sample
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14. Is the process of selecting a portion - or sample - of the entire population
Data
Raw Data
Inferential Statistics
Sampling
15. Is denoted by 'N' - is the number of data values in the population
Distribution
Population Size
Inferential Statistics
range
16. Is the portion of the population that is selected for study
Data Set
Sample
Population Size
Representative Sample
17. Is the entire collection of all individuals or objects of interest
q
Nominal
Statistic
Population
18. Population proportion
p
Nominal
Skewed Distribution
q
19. A method of data collection where the researcher selects a sample from the population and measures the variable of interest
Survey
P(A)
Outlier
Systematic sampling
20. Variable where the value is a number that results from a measurement process - also called numerical data
Sample
Observational study
Numerical Variable
Outliers
21. Can be used to get an initial graphical view of data
Percentile
Dot plots
Census
22. A method of experimentation in which you can control as many variables as possible in order to isolate the effects of a response variable
Dot plots
Outlier
Designed experiment
P(A)
23. (largest data value) - (smallest data value)
Distribution
Disjoint event
S
range
24. _______________ are numerical measurements that can assume any value between two numbers
s
Observational study
Range
Continuous Data
25. Sum of the values
Cluster sampling
S x
Pictograph
Discrete Data
26. Occur when one of them affects the probability of the other.
Dependent events
Alpha (a)
Descriptive Statistics
s
27. Uses numerical and or visual techniques to summarize or describe the data in a clear effective manner
Descriptive Statistics
q
Pictograph
Bias
28. 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
n
Symmetric Distribution
Characteristic of a distribution
29. Occur when one does not affect the probability of the occurrence of the other.
Independent events
p
Outliers
Designed experiment
30. _______________ 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
Parameter
x
Observational study
Distribution
31. Test use normalcdf(ZTS -999)
p value right tail
Sampling
Statistic
Survey
32. Sample variance
s2
Sample
Variable
Random Sample or Probability Sample
33. Range - standard deviation and variance.
H1
Stem and leaf plots
The 3 measures of variation
Statistic
34. Mean - mode - median and midrange.
q
The 4 measures of center
Simple Random Sample
Ordinal
35. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc
Symmetric Distribution
Range
Alpha (a)
Discrete Data
36. A descriptive tool used to visually describe the characteristics and relationships of collections of data quickly and attractively
Graph
Outliers
Population
q
37. Determine the location of the middle value of all the data values
Statistics
Center of Distribution
Outliers
Exploratory data analysis
38. Population size
Bias
N
P(A)
39. 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
Census
Range
Categorical Variable
Random Sample or Probability Sample
40. Type II error is measured
Systematic sampling
What symbol must always be found in H0
Statistic
41. Mu; population mean
Center of Distribution
H0
Exploratory data analysis
42. Is a sample containing similar characteristics of the population
p
S
The 4 measures of center
Representative Sample
43. Statistics
Numerical measurement describing some characteristic of a sample.
x
s2
Random Sample or Probability Sample
44. An individual data value which lies far (above or below) from most or all of the other data values within a distribution
Simple random sample
S x
Sampling
Outlier
45. Square the standard deviation and to find the population variance square of the population standard deviation
Nominal
Sample Variance
The 3 measures of variation
Graph
46. 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
q
Statistics
p value two tailed test
Parameter
47. Disjoint events cannot overlap. They are mutually exclusive if they cannot occur at the same time.
Distribution
Statistic (note there is no 's' at the end)
Disjoint event
48. Always use a equal symbol
Convenience sampling
What symbol must always be found in H0
Numerical measurement describing some characteristic of a sample.
Random Sample or Probability Sample
49. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.
H0
Stem and leaf plots
Numerical Variable
Data Set
50. One extreme value can affect it dramatically.
Sample Size
Graph
The effect of extreme values on the measures of center
Frequency