- AMean, Median, and Mode
- BRange, Standard Deviation, and Variance
- CMean and Median
- DRange and Median
দেশ-মহাদেশ - Quiz
- AInferential Statistics
- BDescriptive Statistics
- CAll the options
- DNone of the options
- ARandom Variable
- BEvent
- CPopulation
- DSample
- AHypothesis Testing
- BStatistical Hypothesis
- CNone of the options
- AMedian
- BMean
- CMode
- DAll the options
- AWavelength
- BFrequency
- CAmplitude
- DSpeed
- ARed
- BGreen
- CBlue
- DYellow
- ADiffraction
- BInterference
- CPolarization
- DChange in speed
- ARed
- BGreen
- CBlue
- DYellow
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দেশ-মহাদেশ - Quiz
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Time Taken: Questions: Answered: Not Answered:
Correct Answer:
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Percentage: %
- A. Mean, Median, and Mode
- B. Range, Standard Deviation, and Variance
- C. Mean and Median
- D. Range and Median
Remarks:
Explanation:
Range, Standard Deviation, and Variance
- A. Inferential Statistics
- B. Descriptive Statistics
- C. All the options
- D. None of the options
Remarks:
Explanation: The correct answer is "Inferential Statistics". Inferential statistics is the branch of statistics that deals with making inferences about a population based on information gathered from a sample. It involves using statistical methods to draw conclusions about a population parameter based on sample statistics. In contrast, descriptive statistics involves summarizing and describing the characteristics of a sample or population, without making any inferences beyond the data at hand.
- A. Random Variable
- B. Event
- C. Population
- D. Sample
Remarks:
Explanation: The correct answer is "Random Variable". A random variable is a variable that takes on numerical values that are determined by the outcome of a statistical experiment. In other words, a random variable is a numerical representation of the outcomes of a random process. Random variables can be discrete or continuous, depending on whether they take on a countable or uncountable number of values, respectively. They are a fundamental concept in probability theory and statistics and are used to model a wide range of phenomena in many fields, including economics, engineering, and biology.
- A. Hypothesis Testing
- B. Statistical Hypothesis
- C. None of the options
Remarks:
Explanation: The correct answer is "Hypothesis Testing". Hypothesis testing is a formal statistical procedure used to make decisions about whether to accept or reject a hypothesis. It involves formulating a null hypothesis and an alternative hypothesis, collecting data, and using statistical methods to determine the likelihood that the data is consistent with the null hypothesis. If the data is unlikely to have occurred by chance alone, the null hypothesis is rejected in favor of the alternative hypothesis. Hypothesis testing is widely used in fields such as science, engineering, and business to make informed decisions based on empirical evidence.
- A. Median
- B. Mean
- C. Mode
- D. All the options
Remarks:
Explanation:
The correct answer is "All the options". The measures of central tendency are a set of descriptive statistics that provide information about the center of a distribution or a dataset. The three most commonly used measures of central tendency are the mean, median, and mode.
The mean is the arithmetic average of a dataset, and it is calculated by adding up all the values and dividing by the number of values.
The median is the middle value of a dataset, and it is the point that divides the data into two equal halves.
The mode is the value that appears most frequently in a dataset.
All three measures of central tendency are important in different contexts, and they can provide different insights into the characteristics of a dataset.
- A. 1
- B. 2
- C. 3
- D. 4
Remarks:
Explanation:
Answer: b) 2
Explanation: A standing wave that is fixed at both ends can have a maximum of two nodes. One node will be located at the center of the wave, and the other node will be located at one end of the wave.
- A. Wavelength
- B. Frequency
- C. Amplitude
- D. Speed
Remarks:
Explanation:
Answer: c) Amplitude
Explanation: The amplitude of a sound wave is the measure of its maximum displacement from its resting position. A larger amplitude corresponds to a louder sound, while a smaller amplitude corresponds to a softer sound.
- A. Red
- B. Green
- C. Blue
- D. Yellow
Remarks:
Explanation:
Answer: c) Blue
Explanation: The wavelength of blue light is shorter than the wavelengths of red, green, and yellow light. Blue light has a wavelength of approximately 400-500 nanometers, while red light has a wavelength of approximately 620-750 nanometers.
- A. Diffraction
- B. Interference
- C. Polarization
- D. Change in speed
Remarks:
Explanation:
Answer: d) Change in speed
Explanation: Refraction is the bending of light as it passes through a medium with a different density, which causes a change in its speed.
- A. Red
- B. Green
- C. Blue
- D. Yellow
Remarks:
Explanation:
Answer: d) Yellow
Explanation: The primary colors of light are red, green, and blue. Yellow is a secondary color that is produced by combining red and green light.