A recent survey of 1,014 American adults found that 46% view environmental conditions as either "excellent" or "good" (Gallup, March 4—7). Construct a 95% confidence interval of the population proportion.
A recent survey of 1,014 American adults found that 46% view environmental conditions as either "excellent" or "good" (Gallup, March 4—7). Construct a 95% confidence interval of the population proportion.
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A recent survey of 1,014 American adults found that 46% view environmental conditions as either "excellent" or "good" (Gallup, March 4—7). Construct a 95% confidence interval of the population proportion.
a. Construct a 95% confidence interval estimate of the population proportion of adults who had bought...
a. Construct a 95% confidence interval estimate of the
population proportion of adults who had bought something online
b. Construct a 95% confidence interval estimate of the
population proportion of online shoppers who are weekly online
shoppers.
A research center survey of 2,351 adults found that 1,899 had bought something online. Of these online shoppers, 1,203 are weekly online shoppers. Complete parts (a) through (c) below.
please answer both:) 2. In a recent survey, we are 95% confident the population percentage of...
please answer both:)
2. In a recent survey, we are 95% confident the population percentage of all adults that believe in UFO's is between 18.25% and 20.75%. a. Determine the Best point Estimate. b. Determine the Margin of Error. 3. In a March 2010 poll of 1600 American adults, 1088 described themselves as "totally happy" (this category included both very happy" or "somewhat happy” responses) Use STATCRUNCH to construct a 95% confidence interval for the proportion of American adults who...
In a survey of 2280 adults, 709 say they believe in UFOS. Construct a 95% confidence...
In a survey of 2280 adults, 709 say they believe in UFOS. Construct a 95% confidence interval for the population proportion of adults who believe in UFOS. A 95% confidence interval for the population proportion is ( (Round to three decimal places as needed.) ) Interpret your results. Choose the correct answer below O A. With 95% confidence, it can be said that the population proportion of adults who believe in UFOS is between the endpoints of the given confidence...
Construct a 95% confidence interval to estimate the population proportions 3. In a recent poll of...
Construct a 95% confidence interval to estimate the population
proportions
3. In a recent poll of 200 household, it was found the 1 52 households had at least one computer. Estimate the proportion of household in the population that has at least one computer. Construct a 95% confidence interval to estimate the population proportions.
In 2001, the Gallup poll found that 81% of American adults believed that there was a...
In 2001, the Gallup poll found that 81% of American adults believed that there was a conspiracy in the death of President Kennedy. In 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the assassination, and found that 634 believe there was a conspiracy ("Gallup news service," 2013). Do the data show that the proportion of Americans who believe in this conspiracy has decreased? Test at the 5% significance level. 1- What is...
Answers only is okay! Construct the indicated confidence interval for the population mean μ using the...
Answers only is okay! Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c=0.99, x=13.1, s=3.0, n= 6 Construct the indicated confidence interval for the population mean μ using the t-distribution. Assume the population is normally distributed. c=0.95, x=14.5, s=0.55, n= 15 Use the given confidence interval to find the margin of error and the sample mean. (12.7,19.9The sample mean is In a random sample of 18 people, the mean...
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion...
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. A Gallup poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.039? Write only an integer as your answer. Your Answer: Answer Question 20 (5 points) A researcher wants to construct a...
Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion...
Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when the margin of error equals 5% . a.p 0.70 b. p 0 80 c.p 0 90 Click the icon to view a table of standard normal cumulative probabilties a, nm (Round up to the nearest integer)
Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when...
Construct a 95% confidence interval of the population proportion using the given information. x= 125, n...
Construct a 95% confidence interval of the population proportion using the given information. x= 125, n = 250 Click here to view the table of critical values. The lower bound is 454 The upper bound is 546 (Round to three decimal places as needed.)
7) In a recent Pew Research Center survey (Oct 17, 2019) of 3500 U.S. adults, 1890...
7) In a recent Pew Research Center survey (Oct 17, 2019) of 3500 U.S. adults, 1890 adults said congress should continue with impeachment proceedings. 18 points a) Show work for finding the point estimate, p b) Find the margin of error, E, using a 95% confidence level and round to 3 decimal places. c) Find a 95% confidence interval for the population proportion from this survey, show all values used and round to 3 decimals. d) Interpret your answer. e)...
a. Construct a 95% confidence interval estimate of the
population proportion of adults who had bought something online
b. Construct a 95% confidence interval estimate of the
population proportion of online shoppers who are weekly online
shoppers.
A research center survey of 2,351 adults found that 1,899 had bought something online. Of these online shoppers, 1,203 are weekly online shoppers. Complete parts (a) through (c) below.
please answer both:)
2. In a recent survey, we are 95% confident the population percentage of all adults that believe in UFO's is between 18.25% and 20.75%. a. Determine the Best point Estimate. b. Determine the Margin of Error. 3. In a March 2010 poll of 1600 American adults, 1088 described themselves as "totally happy" (this category included both very happy" or "somewhat happy” responses) Use STATCRUNCH to construct a 95% confidence interval for the proportion of American adults who...
In a survey of 2280 adults, 709 say they believe in UFOS. Construct a 95% confidence interval for the population proportion of adults who believe in UFOS. A 95% confidence interval for the population proportion is ( (Round to three decimal places as needed.) ) Interpret your results. Choose the correct answer below O A. With 95% confidence, it can be said that the population proportion of adults who believe in UFOS is between the endpoints of the given confidence...
Construct a 95% confidence interval to estimate the population
proportions
3. In a recent poll of 200 household, it was found the 1 52 households had at least one computer. Estimate the proportion of household in the population that has at least one computer. Construct a 95% confidence interval to estimate the population proportions.
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. A Gallup poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.039? Write only an integer as your answer. Your Answer: Answer Question 20 (5 points) A researcher wants to construct a...
Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when the margin of error equals 5% . a.p 0.70 b. p 0 80 c.p 0 90 Click the icon to view a table of standard normal cumulative probabilties a, nm (Round up to the nearest integer)
Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when...
Construct a 95% confidence interval of the population proportion using the given information. x= 125, n = 250 Click here to view the table of critical values. The lower bound is 454 The upper bound is 546 (Round to three decimal places as needed.)
7) In a recent Pew Research Center survey (Oct 17, 2019) of 3500 U.S. adults, 1890 adults said congress should continue with impeachment proceedings. 18 points a) Show work for finding the point estimate, p b) Find the margin of error, E, using a 95% confidence level and round to 3 decimal places. c) Find a 95% confidence interval for the population proportion from this survey, show all values used and round to 3 decimals. d) Interpret your answer. e)...
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