Podcast
Questions and Answers
What is the difference between primary and secondary data?
What is the difference between primary and secondary data?
- Primary data is gathered by other individuals or agencies, while secondary data is gathered directly from an original source
- Primary data is more relevant and reliable, while secondary data is less accurate
- Primary data is less detailed, while secondary data provides accurate statistics used in the survey.
- Primary data is gathered directly from an original source, while secondary data is gathered by other individuals or agencies. (correct)
What is the ideal number of class intervals or categories for constructing a frequency distribution?
What is the ideal number of class intervals or categories for constructing a frequency distribution?
- Between 5 and 10
- Between 1 and 5
- More than 15
- Between 3 and 15 (correct)
What is the basis of the bars in a histogram?
What is the basis of the bars in a histogram?
- The x-axis (correct)
- The frequency of the data points
- The y-axis
- The midpoint of the class interval
What is the ideal number of classes for constructing a frequency distribution?
What is the ideal number of classes for constructing a frequency distribution?
When constructing a frequency distribution, what should be the relationship between the number of classes and the size of the class interval?
When constructing a frequency distribution, what should be the relationship between the number of classes and the size of the class interval?
Which of the following is NOT a method of collecting data?
Which of the following is NOT a method of collecting data?
What is the range of a set of data if the highest value is 50 and the lowest value is 10?
What is the range of a set of data if the highest value is 50 and the lowest value is 10?
What is the formula for cumulative frequency?
What is the formula for cumulative frequency?
What does planning a study involve?
What does planning a study involve?
What is the recommended number of classes for a series with 50-100 cases?
What is the recommended number of classes for a series with 50-100 cases?
What is the purpose of a frequency polygon?
What is the purpose of a frequency polygon?
What is the maximum number of classes recommended for a series with more than 100 cases?
What is the maximum number of classes recommended for a series with more than 100 cases?
What are the different types of questions?
What are the different types of questions?
What makes a good questionnaire?
What makes a good questionnaire?
What are the different sampling techniques?
What are the different sampling techniques?
What do graphs do?
What do graphs do?
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Study Notes
- There are two types of data: primary and secondary.
- Primary data is gathered directly from an original source, while secondary data is gathered by other individuals or agencies.
- Primary data is more relevant, reliable, and gives detailed definitions of terms and accurate statistics used in the survey.
- There are different methods of collecting data, including direct/interview, indirect/questionnaire, registration, observation, and experiment methods.
- Planning a study involves estimating the number of items in the population, assessing resources, determining sample size, picking samples, and preparing questions.
- There are different types of questions, including structured and unstructured/open-ended questions.
- Good questionnaires have short and clear questions, avoid leading questions, and limit questions to essential information.
- Sampling techniques include random sampling, lottery sampling, and direct selection method.
- Collected data can be presented in textual, tabular, or graphical form.
- Graphs are pictures of numerical data that summarize and show visually what would have been expressed in words.
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