Chapter 1 ECONOMICS : Descriptive Statistics — Online MCQ Test
ECONOMICS · CLASS 12 INTER II YEAR · Andhra State Board
Practice Chapter 1 ECONOMICS : Descriptive Statistics with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers basic statistical tools data collection representation measures of central tendency arithmetic mean median and mode..
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Chapter 1 ECONOMICS : Descriptive Statistics — Important Questions & Answers
Which of the following is defined as the sum of all observations divided by the number of observations?
- A. Median
- B. Arithmetic Mean
- C. Mode
- D. Range
Answer: B. Arithmetic Mean
The arithmetic mean is calculated by summing all values and dividing by the total count of observations.
The arithmetic mean is calculated by summing all values and dividing by the total count of observations.
Data collected by the investigator for a specific purpose for the first time is known as ________.
- A. Secondary data
- B. Primary data
- C. Processed data
- D. Sampled data
Answer: B. Primary data
Primary data is original data collected by the researcher for the first time.
Primary data is original data collected by the researcher for the first time.
If a data set has two values that appear with the highest frequency, the distribution is said to be ________.
- A. Unimodal
- B. Bimodal
- C. Multimodal
- D. Symmetrical
Answer: B. Bimodal
A distribution with two modes is called bimodal.
A distribution with two modes is called bimodal.
In a distribution where mean = 20 and median = 20, the distribution is likely ________.
- A. Positively skewed
- B. Negatively skewed
- C. Symmetrical
- D. Bimodal
Answer: C. Symmetrical
In a perfectly symmetrical distribution, the mean, median, and mode are identical.
In a perfectly symmetrical distribution, the mean, median, and mode are identical.
What is the relationship between Mean, Median, and Mode in a moderately asymmetrical distribution?
- A. Mode = 3 Median - 2 Mean
- B. Mean = 3 Median - 2 Mode
- C. Median = 3 Mean - 2 Mode
- D. Mode = 2 Median - 3 Mean
Answer: A. Mode = 3 Median - 2 Mean
According to Karl Pearson's empirical formula for moderately skewed distributions, Mode = 3 Median - 2 Mean.
According to Karl Pearson's empirical formula for moderately skewed distributions, Mode = 3 Median - 2 Mean.