Random Sampling, Parameter and Statistic, and Sampling Distribution of Statistics I. Encircle the letter of the best answer. 1. It refers to the entire group that is under study or investigation. A. population C. random sampling B. sample D. subset 2. It is a subset taken from a population, either by random or nonrandom sampling techniques. A. population C. random sampling B. sample D. lottery sampling 3. What sampling technique in which members of the population are listed and samples are selected in intervals called sample intervals. A. systematic sampling C. stratified random sampling B. lottery sampling D. quota sampling 4. It is sometimes called area sampling, it applies on a geographical basis. A. systematic sampling C. stratified random sampling B. lottery sampling D. cluster sampling 5. It refers to a part of the sampling technique where each sample point has an equal chance of being selected. A. systematic sampling C. stratified random sampling B. lottery sampling D. quota sampling II. Decide whether the statement describes a parameter or statistic. 1. The average income of 40 out of 100 households in a certain Barangay isP 12, 213.00 a month. 2. Percentage of red cars in the Philippines. 3. Number of senior high schools in Region 3. 4. A recent survey of a sample of 250 high school students reported the average weight of 54.3 kg. 5. Average age of students in East High School.8 or O. 1 ag or 0. 1 Observe that all sample means appeared only one; thus, their probability is P(x)= 1/10 or 0.1 E. LET US PRACTICE MORE TV Construct a sampling distribution of sample mean and answer the questions on your ES answer sheet. Samples of 3 cards are drawn from a population of five cards numbered from 1-5. space 1. How many are the possible outcomes? 2. What are the possible means? 3. What is the probability of getting 4 as a mean? 4. What is the probability of getting 2 as a mean? 5. What is the probability of getting 3.33 as a mean? F. EVALUATION 1. Determine the statement whether it is true or false. Write T if the statement is true and F if it is false. Write your answer on a separate sheet of paper. a. A statistic is a number which describes a sample. b. A parameter is a descriptive measure of population. c. An example of parameter is the sample mean. d. The value of a parameter can be approximated and is not necessarily equal to the statistic of a sample. e . An example of statistic is a population mean. 2. Give 5 examples of parameter and 5 examples of statistic. Write your answer on a separate sheet of paper. 3. Construct all random samples consisting two observations from the given data. You are asked to guess the average weight of the six watermelons by taking a random sample without replacement from the population. Watermelon A B C D E F Weight (in pounds) 19 14 15 9 10 17 IV. RUBRIC FOR SCORING Excellent Satisfactory Developing Beginning ION Criteria 10 points 8 points 5 points 2 points ICATION Shows accurate Sows solution with The solution is all Accuracy of Shows solution solution minimal errors with plenty of erroneous the Solution errors