In a Gallop Poll of 1487 adults 639 of them had Facebook pages. Find the best point estimate of the percentage of all adults to the nearest 1% who have a Facebook Page.
solution:
Solution :
Given that,
n = 1487
x = 639
Point estimate =
= x / n = 639/1487=0.430
which is 43%=0.430
In a Gallop Poll of 1487 adults 639 of them had Facebook pages. Find the best...
In a Gallup poll, 1025 randomly selected adults were surveyed and 298 of them said that they used the internet for shopping at least a few times a year. a) Find the point estimate of the percentage of adults who use the internet for shopping. b) Find a 99% confidence interval estimate of the percentage of adults who use the internet for shopping.
11: In a Gallup poll of 1000 randomly selected adults, 347 of them said they were underpaid. Construct a 95% confidence interval estimate of the percentage (proportion) of all adults who say that they are underpaid. Round to the nearest hundredth. 12: If you are using a ? −test when testing a claim about a population mean and the sample size is 53, the number of degrees of freedom is ________.
In a poll of 500 adults, 215 of them said that they voted in the last election. Find critical value and margin of error, and then construct a 99% confidence interval for the proportion of all adults who voted in the last election
A poll taken this year asked 1009 adults whether they were fans of a particular sport and 55% said they were. Last year, 56% of a similar-size sample had reported being fans of the sport. a) Find the margin of error for the poll taken this year if one wants 90% confidence in the estimate of the percentage of adults who are fans of the sport. b) If one wanted to be 85% confident instead of 90% confident, would the...
Ses In a Gallup poll, 1025 randomly selected adults were surveyed, and 298 of them said that they used the Internet for shopping at least a few times a year. Find a 95% confidence interval estimate of the percentage of adults who use the Internet for shopping at least a few times a year, Hon ork A. 29.07% +2.78% O B. 29.07% +5.56% OC. 29.07% +3.06% OD. 29.07% 11.12% & T lan book unch
In a Gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the Internet for shopping at least a few times a year. Find a 99% confidence interval estimate of the proportion of adults who use the Internet for shopping. (5 points)
According to a recent Gallup poll, only 294 out of 1014 adults working full time strongly agree that their performance reviews are fair. A) Based on this finding, what is the best point estimate (in percentage form) for the true estimate of adults working full time that strongly agree that their performance reviews are fair? B) Find the margin of error for this poll assuming 95% confidence (using normal approximation). Carry to four decimal places. C) What is the 95%...
A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one or more tattoos. Test the claim that less than 25% of adults have one or more tattoos. Use a 5% level of significance. State the decision rule
Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tollers. Use a 0.02 margin of error, use a confidence level of 90%, and use results from a prior poll suggesting that 16% of adults have consulted fortune tellers. n= (Round up to the nearest integer.)
Choose the BEST answer In 2007 a Gallup poll estimated that 45% of US adults rated their f nancial situation as good we want to know if the proportion is smaller this year. We gather a random sample of 100 US adults this year and find that 39 rate their financial situation as good." After carrying out a hypothesis test for p 0.45 compared to p 0.45, we obtain a p-value of 0114 Is the following statement about the p-value...