how many people would you have to poll to be 95% sure that your margins of...
how many people would you have to poll to be 95% sure that your margins of error will be less than 3%? please show all the work and formulas used
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how many people would you have to poll to be 95% sure
that your margins of...
In a poll, 37% of the people polled answered yes to the question "Are you in...
In a poll, 37% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 33%, and the estimate was made with 94% confidence. At least how many people were surveyed? Please show work, and how you'd use a TI84 calc. to solve it.
In a poll, 69% of the people polled answered yes to the question "Are you in...
In a poll, 69% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 2%, and the estimate was made with 95% confidence. At least how many people were surveyed?
If I have a sample of 200 randomly selected people in a city of whom 120...
If I have a sample of 200 randomly selected people in a city of whom 120 are Christians, what would be a 95% confidence interval for the proportion of Christians in that city? If I want my confidence interval with a margin of error of 1% or less, how many people should I have in my sample? please show in excel in with formulas
When doing polling, for instance to figure out how popular a given candidate is, a common trick is to just ask N many people whether they support that candidate, and take the support to be the faction of people who say yes: if 70 people support the candid
When doing polling, for instance to figure out how popular a given candidate is, a common trick is to just ask N many people whether they support that candidate, and take the support to be the faction of people who say yes: if 70 people support the candidate out of 100 asked, we estimate the support at 70% or 0.7. Suppose that the probability a person supports a candidate is p, which you do not know. Let pˆN be the...
1. In a poll, 69% of the people polled answered yes to the question "Are you...
1. In a poll, 69% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 33%, and the estimate was made with 94% confidence. At least how many people were surveyed? 2. A simple random sample of size n is drawn. The sample mean, x overbar, is found to be 17.9,and the sample standard deviation, s, is found to...
5. Describe in detail how you would construct a 95% confidence interval for a set of...
5. Describe in detail how you would construct a 95% confidence interval for a set of 30 data (4 points) points whose mean is 20 and population standard deviation is 3. Be sure to show that you know the formula and how to plug into it. Also, clearly state the margin of error 6. If the margin of error in an estimate for the mean weight of a shipment is + or -2 pounds at a (4 points) confidence level...
Suppose that you are planning a two-group experiment. How high would your t value have to...
Suppose that you are planning a two-group experiment. How high would your t value have to be for half of the variance of your dependent variable to be accounted for a. If you use 25 participants per group? b. If you use 81 participants per group? Please show ALL work, including the formulas used.
A recent poll of 960 Facebook users posed the following question: “Thinking just about your Facebook profile, how many friends do you currently have in your network?” The pie chart below represents th...
A recent poll of 960 Facebook users posed the following
question: “Thinking just about your Facebook profile, how many
friends do you currently have in your network?” The pie chart below
represents their responses. The margin of error is 3.2% 10. What is
the population represented here? 11. What is the sample? 12.
Calculate the confidence interval for those who have 101-250
friends. 13. Interpret the confidence interval for this poll in a
meaningful sentence for those who have 101...
In a poll, 69% of the people polled answered yes to the question "Are you in...
In a poll, 69% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 22%, and the estimate was made with 96% confidence. At least how many people were surveyed? The minimum number of surveyed people was __ (Round up to the nearest integer.)
In a poll, 51% of the people polled answered yes to the question "Are you in...
In a poll, 51% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 2%, and the estimate was made with 94% confidence. At least how many people were surveyed? The minimum number of surveyed people was? (Round up to the nearest integer.)
In a poll, 69% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 2%, and the estimate was made with 95% confidence. At least how many people were surveyed?
5. Describe in detail how you would construct a 95% confidence interval for a set of 30 data (4 points) points whose mean is 20 and population standard deviation is 3. Be sure to show that you know the formula and how to plug into it. Also, clearly state the margin of error 6. If the margin of error in an estimate for the mean weight of a shipment is + or -2 pounds at a (4 points) confidence level...
A recent poll of 960 Facebook users posed the following
question: “Thinking just about your Facebook profile, how many
friends do you currently have in your network?” The pie chart below
represents their responses. The margin of error is 3.2% 10. What is
the population represented here? 11. What is the sample? 12.
Calculate the confidence interval for those who have 101-250
friends. 13. Interpret the confidence interval for this poll in a
meaningful sentence for those who have 101...
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