here as sampling is done from each cluster or region and all participant are invited
This is an example of cluster sampling.
The American nursing association randomly selects 100 of its members from each state and invites them...
In a survey conducted by the American Animal Hospital Association, 37 % of the respondents stated that they talk to their pets on the phone. Pagotes is a veterinarian and he doubts this. He thinks it’s less. He randomly selects 150 pet owners and discovered that 54 of them spoke to their pet on the telephone. Can Pagotes be sceptical? Analyse the problem at the 5% level of significance.
Alec wants to study the relationship between gender and resting heart rate among all adults in Chicago. He randomly selects 100 students at Northwestern University and invites them to participate in his study. For each participant, he records their gender, and then measures their resting heart rate in beats/minute. A. What kind of study is this: an observational study-sample survey, an observational study-census, or an experiment? B. What is the population? C. What is the sample? D. List each of...
The American Association of Individual Investors (AAII) On-Line Discount Broker Survey polls members on their experiences with discount brokers. As part of the survey, members were asked to rate the quality of the speed of execution with their broker as well as provide an overall satisfaction rating for electronic trades. Possible responses (scores) were no opinion (0), unsatisfied (1), somewhat satisfied (2), satisfied (3), and very satisfied (4). For each broker summary scores were computed by calculating a weighted average...
A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered. (a) Does this provide compelling evidence for concluding that more than 10% of all plates blister under such circumstances? State and test the appropriate hypotheses using a significance level of .05. In reaching your conclusion, what type of error might you have committed? (b) If it is really the case that...
A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered. If it is really the case that 15% of all plates blister under these circumstances and a sample size of 100 is used, how likely is it that the null hypothesis of part (a) will not be rejected (to 4 decimal places). (The probability of making a type 2 error when...
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 370 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 370 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? Attitude 1st Survey 2nd Survey Optimistic 7% 11% Slightly Optimistic 28% 24% Slightly Pessimistic...
The American Association of Individual Investors (AAII) On-Line Discount Broker Survey polls members on their experiences with electronic trades handled by discount brokers. As part of the survey, members were asked to rate their satisfaction with the trade price and the speed of execution, as well as provide an overall satisfaction rating. Possible responses (scores) were no opinion (0), unsatisfied (1), somewhat satisfied (2), satisfied (3), and very satisfied (4). For each broker, summary scores were computed by computing a...
From a July 2019 survey of 889 randomly selected American households, it was discovered that 725 of them have an Amazon Prime membership. a) Calculate the sample proportion of American households that have an Amazon Prime membership. Round this value to four decimal places. b) Write one sentence each to check the three conditions of the Central Limit Theorem. Show your work for the mathematical check needed to show a large sample size was taken.
A manufacturer of nickel-hydrogen batteries randomly selects 120 nickel plates for test cells, cycles them a specified number of times, and determines that 19 of the plates have blistered. a. Does this provide compelling evidence for concluding that more than 12% of all plates blister under such circumstances? State and test the appropriate hypotheses using a significance level of .05. b. If it is really the case that 17% of all plates blister under these circumstances and a sample size...
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 370 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 370 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? Attitude 1st Survey 2nd Survey Optimistic 7% 11% Slightly Optimistic 28% 24% Slightly Pessimistic...