Identify the population and the sample here. (c) What is the yield per hectare in your field? (c)3 – 6 Packets No. 1.1 Descriptive and Inferential Statistics 1.2 Statistics in Research 1.3 Scales of Measurement 1.4 Types of Data There is a certain bias involved in the non-random selection of samples. If the field of investigation or the population size is large, then the possibility of Non-sampling Errors also increases. 2. d. More than Rs 30,000. a. b) No. b) Between 1 km to 2 km Brand Q15 : Less Time and Energy Consuming- The Sample Method involves study of fewer items of the universe. c) More than 2 km, Q13 :If plastic bags are only 5 percent of our garbage, should it be banned? In this case, all students of the class have equal chance of getting selected. There are many sources of data. For example, if the scores were 1, 3, 5, the median would be 3.0. Answers will vary. Question: WAHLauDLUIS Lock, Statistics: Unlocking The Power Of Data, 2e Wiley PLUS Help System Announcements TIMER PRINTER VERSION BACK NEXT Chapter P, Section 3, Exercise 078 1 | 1 2 3 P(x) 0.20 0.35 0.45 (a) Use The Probability Function Given In The Table To Calculate The Mean Of The Random Variable. Modeling Distributions Of Data. Answer : b. Title: Chapter 2 Descriptive Statistics 1 Chapter 2 Descriptive Statistics 2 - 1 Frequency Distributions 2 2 Displaying Data 2 3 Measures of the Center 2 - 4 Measures of Dispersion 2 5 Measures of Position 2 - 6 Bivariate Data 2 2-1 Frequency Distributions. False. Click the button for 100% free full practice test. The Organization and . The following method can be used while selecting 3 students out of 10 of the class. e. Do you have a two-wheeler? Thus, Non-sampling Errors are more serious than the Sampling Errors. This question is ambiguous. What is the minimum number of values you would need to change the median? There are only two sources of data- primary and secondary data sources. b. But the Non-sampling Errors are difficult to rectify as it would require selection of a new sample and conducting a fresh survey. You may suspect that descriptive statistics also have some short-comings. (b)2 – 3 Packets Exercises: p.105: Chapter Review Exercises: p.136: Chapter 2 AP Statistics Practice Test: p.138: Chapter 3. 8. Large Investigations- When the size of the population is very large and inapproachable, the method of sample is the most feasible. Less Time and Energy Consuming- The Sample Method involves study of fewer items of the universe. the population. Chapter 2. = 120 Q20 :Which of the following errors is more serious and why? Provides Reliable and Accurate Results- The Sample Method provides reliable and accurate results. Because of rise in supply of petrol We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, … True Answer : If we change the 3 to a 4, then the median would be 4.0. Statistics is a section of mathematics that manages the collection, interpretation, analysis and presentation of numerical data. Basic Definitions and Concepts; Overview; Presentation of Data; Chapter 2: Descriptive Statistics. Rise in the price of petrol is justified. (d)Night Answer : Let us assume that the number selected is 05. For example, in a typi-cal survey, by the completion of your data collection phase you will have accumulated thousands of individual responses represented by a jumble of numbers. b. Section 2-3: Graphs That Enlighten and Graphs That Deceive 1. c. 3 to 5 hours a day Sample is the subset of the population. False Exploring Data. Answer : With such a small data set, it would be better to simply list the data or place them in a table. Design a suitable questionnaire for collecting this information. More Efficient- As the sample size is smaller, so small teams of enumerators can be formed. Non-sampling errors can be minimised by taking large samples. c. Have you ever being to any foreign country? These small teams can easily be well trained and supervised. 6 Determine whether a value is discrete or continuous. 1. Chapter 1 Intro Activity. You will be analyzing data using four types of graphs: Circle graphs, Bar graphs, histograms, and cumulative (relative) frequency plots (ogives). Telephone survey is the most suitable method of collecting data when the population is literate and spread over a large area. Mrs. Daniel's AP Statistics. Cost Efficient- The cost of approaching each individual unit for interrogation and collection of data is comparatively lower due to small size of sample. (iv) Now, put all the slips in a box and mix them well. Q21 :Suppose there are 10 students in your class. Answer : These small teams can easily be well trained and supervised. Non-sampling Errors emerge due to the use of faulty means of collection of data, whereas, the Sampling Errors emerge due to the divergence between the estimated and the actual value of a parameter of a small sized sample population. A. s social researchers, we often have to deal with very large amounts of data. 1 to 3 hours a day Answer : b. 2. To make sense out of these data, Answer : Answer : The procedure of selecting random sample of 3 students out of 10 in a class is as follows: 1. The collection of data from its original source is termed as primary source of data. Which of the following newspaper/s do you read regularly? 7.At what time of the day do you prefer the Atta noodles the most Thus, more effective question could be: (d)More than 6 packets d. More than 5 hours, Q3 :Which of the following newspaper/s do you read regularly? Q11 :Non-sampling errors can be minimised by taking large samples (true/ false). The Sampling Errors can be minimised by increasing the size of a small sample, so that the difference between the actual and the estimated value is reduced. Changing either the 1 or the 5 would not change the median (e.g., 2, 3, 100). In a random sample, each individual unit has an equal chance of getting selected. a. Colour Washington Post Smelling Parkison's Article. a. For example, in order to study the growth pattern of students, the heights of 50 students (sample) are recorded from a school of 500 students (population). Consequently, the team is more efficient than that of the team engaged in the surveys. Copyright © 2015 - 2020 Toppers Bulletin. 5.Which Vegetables according to you should be added in present Atta noodles b) No, Q14 :Wouldn’t you be opposed to increase in price of petrol? 4. For example, in order to select a student as monitor, the slips containing the names of all the students are mixed well, and then a slip is drawn out at random. 2.00, which is the numerical value of s for the data from source 2? Do you use cosmetics daily? Sample Method gives better results than the Census Method due to the following reasons. The correct question should be: Tabular Presentation of Data “Tabulation involves the orderly and systematic presentation of numerical data in a form designed […] 2.8 Remember to look at your data. Q8 :Telephone survey is the most suitable method of collecting data, when the population is literate and spread over a large area (true/false). Q18 :Give two examples each of sample, population and variable. (i) Make ten paper slips of equal size. False We are pioneers in the field of Modern Teaching for Commerce Students since year 2000. 1.3 Activity In the above examples, 500 students and 20,000 people constitute the population. Chapter 16: Problems and Prospects: Regression Diagnostics, Advanced Techniques, and Where to Go Now. Consequently, the team can work more efficiently than the team engaged in the Census Method. The score that is the median or closest to it. Answer : Statistics provides an extensive range of concepts and introduction to the subject, which includes all the questions in the chapter provided in the Statistics syllabus. Data collected by an investigator is called the secondary data. 1. So, Non-sampling Errors maximises by taking large samples. 2. The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. (a)Yes The data set is too small for a graph to reveal important characteristics of the data. (b)Afternoon This is because of the fact that errors can be easily located and rectified in the sampling methods due to the smaller number of items. This document was created with Prince, a great way of getting web content onto paper. b. Rs 10,000 to Rs 20,000 6.Do you think it should be spicier Descriptive statistics are great and we will use them a lot in the course to describe data. More Efficient- As the sample size is smalle, so the small teams of enumerators can be formed. A population consists of all subjects under study while a sample is a subgroup of 19. (b)No Enter The Exact Answer. Q10 :There is a certain bias involved in the non-random selection of samples (true/false). 18. CHAPTER 2 - LAB SESSION 1 GRAPHIC PRESENTATION OF UNIVARIATE DATA INTRODUCTION: Graphically representing data is one of the most helpful ways to become acquainted with the sample data. Chapter 1. TR Jain Economics Statistics Solutions Class 11 is a well-known name in the field of Economics because of its content, Easy explanation of various complex questions, the conceptual interlinking from various topics and a broad variety of questions for study and more. Appendix B: 100 Articles That Use Statistics in Less than Scary Ways. The errors that are related to the collection of data are termed as Non-sampling Errors. Chapter 2 Measures of location: Mode Measures of location: Median Measures of location: Mean 3. a. Chapter 10 Comparative Development Experience of India with its Neighbours; Statistics for Economics Class 11 NCERT Solutions. Lesser Non-sampling Errors- The probability of Non-sampling Errors is also low as the sample size is smaller as compared to that of the Census Method. Answer : Population = 10, Number of Possible Samples = nCr = 10C3 5. (iii) Do you agree with the use of chemical fertilisers? 2. 11th Class Statistics Chapter 2 Test. c. Because of rise in petrol duty NCERT Solutions for Class 11 Economics -Statistics for Economics – Chapter 2 – Collection of Data, A detailed Guide to Financial Ratios – Ratio Analysis, NCERT Solutions for Class 11 Economics -Statistics for Economics – Chapter 1 – Introduction, NCERT Solutions for Class 11 Economics -Statistics for Economics – Chapter 3 – Organisation of Data. Chapter 3 Measures of spread: Variance from frequency table Measures of spread: Variance and standard deviation Measures of spread: Range 4. Answer : a. 2. Chapter 2: Presentation of Data. Students find it helpful to answer the questions related to the chapters as NCERT Solution for Class 11 Statistics offers learners various exercises that they can refer to after comprehending the whole chapter. 4. Q22 :Discuss how you would use the lottery method to select 3 students out of 10 in your class? Q7 :There are many sources of data (true/false). NCERT Solutions Class 11 Statistics is explained in a very lucid language that is easy to understand and comprehend. How often do you use computers? (a)Day Q17 : In a village of 200 farms, a study was conducted to find the cropping pattern. 5 Distinguish between qualitative and quantitative data. False Demonstration 3: Producing the χ 2 Statistic for Cross-Tabulations The SPSS Crosstabs procedure can also be used to calculate a χ 2 value for a bivariate table. 2. Question: Lock, Statistics: Unlocking The Power Of Data, E Hele 1 System Announcements Chapter 3, Section 2, Exercise 041 In This Exerdse, Data From A Sample Is Being Used To Estimate Something About A Population. Chapter 4 Probability Conditional Probability ! Three Popular Data Displays; Measures of Central Location; Measures of Variability; Relative Position of Data; The Empirical Rule and Chebyshev’s Theorem; Chapter 3: Basic Concepts of Probability. Therefore, despite sample method providing lesser reliable results (as not all units are studied) yet the sample method is efficient in a sense that errors committed can be easily located. Get step by step NCERT solutions for Class 11 Economics-statistics-for-economics Chapter 2 - Collection of Data. So, this method not only saves time but also energy of the investigator. d. Size, Q2 :How often do you use computers? Statistics are measurements or estimates of natural or social phenomenon, usually systematically arranged, analysed and presented.