0
Your confidence level is 19/20=95%
1% is your margin of error
'either direction' means it's two-sided
Sample size, n, should be larger than (zalpha/2)2p(1-p)/m2
where
zalpha/2 is the upper critical value of the normal distribution. For your level of confidnce (95%) alpha=0.05. So alpha/2=0.025, making z=1.96
p is your 'best guess' about the true value of the proportion. You can estimate with a pilot study, or set to 50% which will maximise the sample size possibly much larger than required.
m is your margin of error (1%)
So choose a sample size of n>=(1.96)2*(0.5)2/0.012=9604
However, this will result in a test with only 50% power (i.e. probability of not getting a false negative is 50%). Typically power is set to around 80%. To increase power the sample size would have to be even larger.
What else can I help you with?
Use of statistics in social work?
In social work, statistics is used by polling individuals to evaluate them by a subset of obtained data. It is also used by sampling certain group to determine their wants.
In polling what are random samples?
fg
The most rigorous technique for selecting a polling sample is?
straw
What is a Poll Clerk?
A poll clerk is an election officer that assists the deputy returning officer at a polling station by checking to see if the person requesting to vote is on the list of electors and by dealing with the paperwork.
What are exit polls?
The practice of exit polling is used extensively by the news media in elections in the United States. Generally speaking these polls are used in state and federal elections. The operation of this practice is to ask citizens exiting polling places how they voted. People often do not want to waste their time in answering the questions of news reporters. When they do, however, it provides voting data to allow the news media to make projections on election winners and losers. Here is an example. In a national election there are places where a political party has many registered voters and has historically, for example, voted for Democrats. If based on the data received in exit polling, respondents inform reporters that they have voted for Republican candidates, instead of Democrats, this unusual voting pattern may project that Republicans are winning a particular election.
What happens when Americans are polled?
Polling companies phone people and ask their opinions on various subjects. Polling can also be done in person but that is more rare. You can accost people in an amusement park, for example, but it is more intrusive than a phone call.
What is a sentence for polling booth?
The polling booth was hacked during the elections.We need to be at the polling both by midday.
What is the most common form of polling?
internet polling
What percent of people support same-sex marriage?
The latest polling shows that 55% of the US population supports same-sex marriage.
Is Polling a place where you vote?
polls, polling is a survey process
How many constituencies and polling stations in Ghana?
230 constituencies and 24,000 polling stations
Use of statistics in social work?
In social work, statistics is used by polling individuals to evaluate them by a subset of obtained data. It is also used by sampling certain group to determine their wants.
The place where citizens bote is called what?
It is called polling station or polling place.
The place where voters go to cast their ballots?
Polling place
When was British Polling Council created?
British Polling Council was created in 2004.
When was Public Policy Polling created?
Public Policy Polling was created in 2001.
When was The Perils of Polling created?
The Perils of Polling was created on 2000-10-01.
