Mean of $25$ observations was found to be $78.4$. But later on it was found that $96$ was misread $69$. The correct mean is
- 79.24
- 79.48
- 80.1
- None of these
The Correct Option is B
Solution and Explanation
Top Questions on Statistics
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Marks : Below 10 Below 20 Below 30 Below 40 Below 50 Number of Students : 3 12 27 57 75 - The mean and median of a statistical data are 21 and 23 respectively. The mode of the data is:
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The length of the leaves from different plants are recorded in the following table.Based on the above information, answer the following questions :\(\text{Length (in mm)}\) 70-80 80-90 90-100 100-110 110-120 120-130 130-140 \(\text{Number of leaves}\) 3 5 9 12 5 4 2
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- Solutions
Concepts Used:
Statistics
Statistics is a field of mathematics concerned with the study of data collection, data analysis, data interpretation, data presentation, and data organization. Statistics is mainly used to acquire a better understanding of data and to focus on specific applications. Also, Statistics is the process of gathering, assessing, and summarising data in a mathematical form.
Mathematically there are two approaches for analyzing data in statistics that are widely used:
Descriptive Statistics -
Using measures of central tendency and measures of dispersion, the descriptive technique of statistics is utilized to describe the data collected and summarise the data and its attributes.
Inferential Statistics -
This statistical strategy is utilized to produce conclusions from data. Inferential statistics rely on statistical tests on samples to make inferences, and it does so by discovering variations between the two groups. The p-value is calculated and differentiated to the probability of chance() = 0.05. If the p-value is less than or equivalent to, the p-value is considered statistically significant.