मराठी

Does the lottery method always give you a random sample? Explain.

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प्रश्न

Does the lottery method always give you a random sample? Explain.

टीपा लिहा
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उत्तर

Yes, the lottery method always gives a random sample’s outcome. In a random sample, each individual unit has an equal chance of getting selected. Similarly, in a lottery method, each individual unit is selected at random from the population and thereby has an equal opportunity of getting selected. For example, in order to select a student as a monitor, the slips containing the names of all the students are mixed well, and then a slip is drawn out at random. In this case, all students in the class have an equal chance of getting selected. The probability of a student getting selected through the lottery method is exactly the same as the probability of any one student randomly selected.

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Concepts of Sampling
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Collection of Data - Exercise [पृष्ठ २१]

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एनसीईआरटी Statistics for Economics [English] Class 11
पाठ 2 Collection of Data
Exercise | Q 12. | पृष्ठ २१

संबंधित प्रश्‍न

Discuss how you would use the lottery method to select 3 students out of 10 in your class?


What is sample?


What is statistic?


What is sampling distribution of a statistic?


Explain in detail about sampling error


State any two merits of simple random sampling


State any two demerits of systematic random sampling


State any two merits for systematic random sampling


Using the following Tippet’s random number table

2952 6641 3992 9792 7969 5911 3170 5624
4167 9524 1545 1396 7203 5356 1300 2693
2670 7483 3408 2762 3563 1089 6913 7991
0560 5246 1112 6107 6008 8125 4233 8776
2754 9143 1405 9025 7002 6111 8816 6446

Draw a sample of 10 three-digit numbers which are even numbers


 A wholesaler in apples claims that only 4% of the apples supplied by him are defective. A random sample of 600 apples contained 36 defective apples. Calculate the standard error concerning of good apples


A random sample of 60 observations was drawn from a large population and its standard deviation was found to be 2.5. Calculate the suitable standard error that this sample is taken from a population with standard deviation 3?


Choose the correct alternative:

A ______ may be finite or infinite according as the number of observations or items in it is finite or infinite


Choose the correct alternative:

A finite subset of statistical individuals in a population is called ______


Choose the correct alternative:

A ______ is one where each item in the universe has an equal chance of known opportunity of being selected


Choose the correct alternative:

Which one of the following is probability sampling


A sample of 100 students is drawn from a school. The mean weight and variance of the sample are 67.45 kg and 9 kg. respectively. Find (a) 95% (b) 99% confidence intervals for estimating the mean weight of the students


Use the data in the Table below that relate to monthly household expenditure (in Rs) on the food of 50 households and

1904 1559 3473 1735 2760
2041 1612 1753 1855 4439
5090 1085 1823 2346 1523
1211 1360 1110 2152 1183
1218 1315 1105 2628 2712
4248 1812 1264 1183 1171
1007 1180 1953 1137 2048
2025 1583 1324 2621 3676
1397 1832 1962 2177 2575
1293 1365 1146 3222 1396

Monthly Household Expenditure (in Rupees) on Food of 50 Households

Find the number of households whose monthly expenditure on food is

(a) less than Rs 2000
(b) more than Rs 3000
(c) between Rs 1500 and Rs 2500

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