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WorksheetsStatistics Unit-I and II
Total questions: 15
Worksheet time: 24mins
1. Which of the following best describes the primary purpose of statistics?
To collect data
To organize and analyze data
To generate random numbers
To estimate population parameters
2. Which sampling method involves selecting individuals based on specific characteristics or criteria set by the researcher?
Simple Random Sampling
Stratified Sampling
Purposive Sampling
Cluster Sampling
3. What is the key difference between a population and a sample in statistics?
A population is a subset of a sample
A sample includes all the individuals in the group
A sample is a subset of a population
A population is always random
4. What does the term “sampling distribution” refer to in statistics?
A distribution of all possible values of a sample statistic from multiple samples
The actual data distribution of a population
The distribution of random numbers used in sampling
A graphical representation of the population data
5. Which of the following is a limitation of using statistics in research?
It can only be applied to numerical data
It requires large amounts of data
It can mislead if data is misinterpreted or manipulated
It is only useful in experimental studies
9.5
9.2
8.5
10.0
7. A group of 5 students has the following test scores: 12, 15, 18, 20, and 25. What is the median of these scores?
15
18
16
17
85.0
87.2
86.4
88.5
9. A data set has the following values: 5, 7, 9, 11, and 13. What is the harmonic mean of this data set?
8.5
8.0
7.5
7.2
10. The following data represents the number of hours spent on studying by 8 students:
3, 5, 7, 9, 10, 12, 14, 15
What is the mode of this data set?
5
9
7
No Mode
11. What is the primary purpose of using a control group in an experiment?
To increase the sample size
To ensure random sampling
To compare against the experimental group
To eliminate bias in data collection
12. Which of the following measures of central tendency is most affected by extreme values?
Range
Mean
Mode
Median
13. What is the purpose of using stratified sampling in research?
To eliminate the need for randomization
To select individuals based on convenience
To divide the population into subgroups and sample from each
To ensure every individual has an equal chance of being selected
14. Which of the following is a common method for visualizing the distribution of a dataset?
Bar Chart
Pie Chart
Histogram
Line Graph
15. What is the purpose of using random sampling in research?
To ensure every individual has an equal chance of being selected
To focus on a specific subgroup of the population
To increase the complexity of the study
To eliminate the need for a control group
