1. Pictorial representation of data using symbols is known as: A. Bar graph B. Pictograph C. Pie chart D. None of these 2. Double bar graphs display ______ sets of data simultaneously. A. Four B. Three C. Two D. No 3. _________ gives the number of times a particular entry occurs. A. Organisation of data B. Collection of Data C. Representation of Data D. Frequency distribution table 4. In grouped data, each of the group is called: A. Class interval B. Collection of data C. Frequency D. Grouped frequency distribution 5. If 20-30 is the class interval of grouped data, then lower class limit is: A. 50 B. 30 C. 20 D. 10 6. For which of these would you use a histogram to show the data? (a) The number of letters for different areas in a postman’s bag. (b) The height of competitors in athletics meet. (c) The number of cassettes produced by 5 companies. (d) The number of passengers boarding trains from 7:00 am to 7:00 pm at a station. Give reasons for each. please tell appropiate answers
Answers
GRAPHS :
1. Pictorial representation of data using symbols is known as: Pictograph (Option B).
Reason : Pictograph is the representation of the data or an idea in the form of a symbol or image. The best examples are wayfinding signage, signboards in traffic signals etc. These type of graphs helps people in understanding the data easily.
2. Double bar graphs display two (Option C) sets of data simultaneously.
Reason : Double bar graph is a graphical representation of the data using two bars arranged besides each other at various heights, be it vertically or horizontally. Such graphs are used for the comparisions between 2 sets.
3. Frequency distribution table (Option D) gives the number of times a particular entry occurs.
Reason : Frequency distribution table is the tabular representation that shows for how many times a particular variable occurs in an event. EIn the table, every element contains the frequency of its occurrences within a particular group or interval. Frequency is simply the count.
4. In grouped data, each of the group is called Class Interval (Option A)
Reason : In grouped data, the data is categorized into the number of divisions called classes. So, the class intervals are the subsets into which the data is grouped. The observations are divided into the groups based on the intervals provided along.
5. If 20-30 is the class interval of grouped data, then lower class limit is: 20 (Option C)
Reason : Lower class limit(20) is the smallest data value that can be attempted into a particular division or a class. This can be called as the lowest boundary value that can be inserted or attempted into a particular set. Where, the highest class limit will be the Upper class limit (30).
6. For which of these would you use a histogram to show the data?
(Option B) The height of competitors in athletics meet.
(Option D) The number of passengers boarding trains from 7:00 am to 7:00 pm at a station.
Reason :
The number of letters for different areas in a postman’s bag : Can't defne class interval.
The height of competitors in athletics meet : Can easily define class interval and represent the data in continuous bars.
The number of cassettes produced by 5 companies : Can't determine the production value. As don't have approximate data, we wont use a histogram, here.
The number of passengers boarding trains from 7:00 am to 7:00 pm at a station : The data can be divided into class intervals and can be arranged into the continuous bars.
Simply, The height of competitors and the train timings can be represented respectively as continuous data which is what needed to picture the histogram (representation of data in continuous bars).
Learn more :
1. What is the class mark and class interval for 5 to 10 class interval ?
https://brainly.in/question/12621500
2. Class mark and class size of the class interval are 25 and 10 respectively then the class interval is ?
https://brainly.in/question/13037451
Answer:
it is not a answer the question is a great