17. The best approach for creating a stratified random sample of a population involves:A drawing an equal number of simple random samples from each subpopulation.B. selecting every kth member of the population until the desired sample size isreached.C. drawing simple random samples from each subpopulation in sizes proportional tothe relative size of each subpopulation.

Answered: 17. The best approach for creating a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Types of Data In each of the following, identify the level of measurement of the sample data (nominal, ordinal, interval, ratio) and the type of sampling used to obtain the data (random, systematic, convenience, stratified, cluster). a. At Albany Medical Center, every 10th newborn baby is selected and the body temperature is measured (degrees Fahrenheit). b. In each of the 50 states, 50 voters are randomly selected and their political party affiliations are identified. c. A pollster stops each person passing her office door and asks the person to rate the last movie that he or she saw (on a scale of 1 star to 4 stars).
5. Sampling Distribution. I selected three different samples of size n = 10 drawn from the 1500 students at my school, and with these I constructed the sampling distribution.
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than five percentage points? Complete parts (a) through (c) below. Question content area bottom Part 1 a) Assume that nothing is known about the percentage of computers with new operating systems. n=385385 (Round up to the nearest integer.) Part 2 b) Assume that a recent survey suggests that about 86% of computers use a new operating system. n=enter your response here (Round up to the nearest integer.)
On a Greensboro (PTI) to Atlanta flight, 7% of the 900 passengers were selected for random security screening before boarding. According to the TSA, 10% of passengers at PTI are chosen for random screening. a. Identify the following and use appropriate notation if necessary. Parameter: Sample: Statistic: Population:
A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these social outreach programs should be located based on the percentage of residents living below the poverty line in each region of the city. He takes a simple random sample of 129 people living in Gastown and finds that 24 have an annual income that is below the poverty line. Part i) The proportion of the 129 people who are living below the poverty line, 24/129, is a:A. statistic.B. parameter.C. variable of interest. Part ii) Use the sample data to compute a 95% confidence interval for the true proportion of Gastown residents living below the poverty line. (Please carry answers to at least six decimal places in intermediate steps. Give your final answer to the nearest three decimal places). 95% confidence interval = ( , )
When considering different sampling methods, cluster sampling includes the steps: _______. Select the correct answer below: A) identify individuals of the population that are easily accessible; obtain data from these individuals B) list the members of the population; use simple random sampling to select a starting point in the population; let k = (number of individuals in the population)/(number of individuals needed in the sample); choose every kth individual in the list starting with the one that was randomly selected C) divide the population into groups; use simple random sampling to identify a proportionate number of individuals from each group D) use simple random sampling to select a set of groups; every individual in the chosen groups is included in the sample
Using the 2k >=n rule, determine the number of classes needed for the following data set sizes. a) The number of classes needed when n=50 is ___. b) The number of classes needed when n=250 is ___. c) The number of classes needed when n=750 is ___. d) The number of classes needed when n= 3,000 is ___. Please help!!
A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these social outreach programs should be located based on the percentage of residents living below the poverty line in each region of the city. He takes a simple random sample of 124 people living in Gastown and finds that 25 have an annual income that is below the poverty line. Part i) The proportion of the 124 people who are living below the poverty line, 25/124, is a: A. statistic. B. variable of interest. C. parameter. Part ii) Use the sample data to compute a 95% confidence interval for the true proportion of Gastown residents living below the poverty line. (Please carry answers to at least six decimal places in intermediate steps. Give your final answer to the nearest three decimal places). 95% confidence interval = ( , )
A gym manager is interested in whether the ‘beginner’ and ‘expert’ climbing walls (that were of the same height) at her facility are actually different from each other. To test this, she decides to look at the time it takes people to reach the top of both walls. She recruits 25 students and has them each climb both walls and looks for differences between the ‘beginner’ wall climbing times and the ‘expert’ wall climbing times. Select one: a. single sample t-test b. one-way ANOVA c. paired samples t-test d. z-test e. factorial ANOVA f. t-test independent means
Suppose that Fairfax County has N=400,000 households. Further, assume that for we have a complete list of these households that contains information for each household that includes estimated household income, household zip code, household address, high school related to the address. We want to collect information from either a sample of n=2000 or conduct a census of all 400,000 by using one of the techniques described below: A = Simple Random Sampling B = Stratified Sampling C = Cluster Sampling D = Systematic Sampling E = Census F = Experimental Design For each scenario below, determine which of the above techniques most closely resembles the data collection strategy being considered. For each scenario you can just designate the technique by using the appropriate letter from above. No further work need to be shown. Using household income, we sort the list from lowest to highest household income and label these sorted households as 1 to 400,000 on our list. We generate a…
In selecting a sample, if you were to obtain a systematic sample of 40 from a population of 600, and your randomly selected starting point is 12, your next three selections should be: a. 24, 36, 48 b. 27, 42, 57 c. 42,92, 137 d. 90, 140, 190
Determine H; and o, from the given parameters of the population and sample size. u = 88, o = 18, n= 36

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS