beginning statistics

[...]... DESCRIPTIVE STATISTICS AND INFERENTIAL STATISTICS: POPULATION AND SAMPLE 1.16 Classify each of the following as descriptive statistics or inferential statistics ( a ) The Nielsen Report on Television utilizes data from a sample of viewers to give estimates of average viewing time per week per viewer for all television viewers (6) The U.S National Center for Health Statistics publication entitled Vital Statistics. .. gives the current percentage of young adults using different types of drugs The percentages are based upon national samples Ans ( a ) inferential statistics (d)descriptive statistics ( b ) inferential statistics ( e ) inferential statistics (c) descriptive statistics 1.17 Classify each of the following as a sample or a population in the United States (6) a group of 374 individuals selected for a New... author would like to thank Minitab Inc for their permission to use output from MINITAB throughout the outline Solved Problems DESCRIPTIVE STATISTICS AND INFERENTIAL STATISTICS: POPULATION AND SAMPLE 1.1 Classify each of the following as descriptive statistics or inferential statistics ( a ) The average points per game, percent of free throws made, average number of rebounds per game, and average number of... tables of measurements such as stock prices and change in stock prices are descriptive in nature and the re fore represent descriptive statistics ((2) The magazine is stating a conclusion about &he population based upon a sample and therefore this is an example of inferential statistics 1.2 Identify the sample and the population in each of the following scenarios ( a ) In order to study the response times... 4 ) ( 2 + 1 + 4 + 5 ) = 7 x 1 2 = 8 4 ( C X ~ - ( C X ) ~ / ~ ) X ( Z ~ ~ - ( C Y )4~+/ 0 + = (6~ 7 2 / 4 ) ~ ( 4 + + ~) 1 1 + 16+25- 12*/4)=(8.75)~(10)= 87.5 COMPUTERS AND STATISTICS The techniques of descriptive and inferential statistics involve lengthy repetitive computations as well as the construction of various graphical constructs These computations and graphical constructions have been simplified... information concerning the players and is therefore considered descriptive statistics 8 INTRODUCTION [CHAP 1 (6) Because of the high percent of boxes of cereal which are under the labeled weight in the sample, a decision is made to increase the weight per box for each box in the population This is an example of inferential statistics ( c ) The tables of measurements such as stock prices and change... improved, unchanged, or worse ( c ) A quality technician records the length of material in a roll product for several products selected from a production line ( d ) The Bureau o Justice Statistics Sourcebook of Criminal Justice Statistics in reporting on the f daily use within the last 30 days of drugs among young adults lists the type of drug as marijuana, cocaine, or s t i mulan t s (adjusted) ( e ) The... information contained in the daily samples is used to construct control charts The control charts are then used to monitor the quality of the products EXAMPLE 1.5 The statistical methods of inferential statistics are used to analyze the data collected in research studies Table 1.2 gives the samples and populations for several such studies The information contained in the samples is utilized to make inferences... questionnaires sent to 2500 households headed by a single parent The CEOs of all private companies The results from surveys sent to 150 CEO’s of private companies EXAMPLE 1.4 The techniques of inferential statistics are applied in many industrial processes to control the quality of the products produced In industrial settings, the population may consist of the daily production of toothbrushes, computer