Give five examples of secondary data that you can collect from your day-to-day life.
(N/A) Secondary data refers to information that has already been collected by someone else for a different purpose and is now being used by you. Five examples of secondary data from day-to-day life are:
$1$. Data regarding the population of your city obtained from the Census website.
$2$. Cricket statistics (e.g.,batting averages,strike rates) of players obtained from a sports website.
$3$. Weather reports and temperature records for the past week obtained from a newspaper or a weather app.
$4$. Nutritional information (e.g.,calories,fat content) printed on the labels of packaged food items.
$5$. Stock market prices or currency exchange rates obtained from a financial news channel or website.
$1$. Data regarding the population of your city obtained from the Census website.
$2$. Cricket statistics (e.g.,batting averages,strike rates) of players obtained from a sports website.
$3$. Weather reports and temperature records for the past week obtained from a newspaper or a weather app.
$4$. Nutritional information (e.g.,calories,fat content) printed on the labels of packaged food items.
$5$. Stock market prices or currency exchange rates obtained from a financial news channel or website.
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Represent the marks of the students of both the sections on the same graph by two frequency polygons. What do you observe?
| Marks | Section $A$ Frequency | Section $B$ Frequency |
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| $0-15$ | $3$ | $3$ |
| $15-30$ | $12$ | $16$ |
| $30-45$ | $28$ | $25$ |
| $45-60$ | $30$ | $27$ |
| $60-75$ | $35$ | $40$ |
| $75-90$ | $13$ | $10$ |
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Marks $0-20$ $20-40$ $40-60$ $60-100$ Number of Students $10$ $15$ $20$ $25$
This distribution has been represented graphically as shown in the image. Is this representation correct? Explain.
| Marks | $0-20$ | $20-40$ | $40-60$ | $60-100$ |
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This distribution has been represented graphically as shown in the image. Is this representation correct? Explain.
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$(2)$ The mode of the observations $1, 3, 5, 7, 9$ is $5$.
$(1)$ The median of the observations $12, 13, 14, 15, 16$ is $14$.
$(2)$ The mode of the observations $1, 3, 5, 7, 9$ is $5$.
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