A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the 99% confidence interval estimate for the proportion of all adults who
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A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the 99% confidence
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- A report showed that 45% of children aged 10-15 get adequate exercise daily. How large a sample is needed to estimate the true proportion of these children getting adequate exercise to within 2.5% with 99% confidence?In a survey of 3426 adults, 1487 say they have started paying bills online in the last year. Construct a 99% confidence interval for the population proportion. Interpret the results.A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random sample by the National Institutes of Health included 2253 men and 2629 women in this age group. The survey found that 986 of the men and 923 of the women lived with their parents. Construct and interpret a 99% confidence interval for the difference in the true proportions of men and women aged 19 to 25 who live in their parents' homes. What conditions are met? (select all that apply) (Remember you check BOTH populations.) O 923 > 30 O 10(923) 30 O 2253 > 30 O a random sample V 2629 > 30 O 986 > 10 O 10(2629) 10 O 1706 > 10 O 923 > 10 O 10(986) < all men aged 19 to 25 O 10(2253) < all men aged 19 to 25 O O
- 700 randomly selected Americans were asked if they believed the minimum wage should be raised. 350 said yes. Construct a 90% confidence interval for the proportion of Americans who believe that the minimum wage should be raised.If P(A) = 0.52, P(B) = 0.45 and P(A u B) = 0.76, then P(B | A) = (Enter a number between 0 and 1, using two decimal points)We wish to estimate what percent of 18 to 25-year old's that own a Samsung phone. Out of 400 sampled, 104 had a Samsung phone. Based on this, construct a 90% confidence interval for the proportion of all adults that own a Samsung phone.
- In a random survey of 2221 North Americans 689 of them had blood type A+. Construct a 94% Confidence Interval for the true proportion of North Americans who have blood type A+.In a survey of 3246 adults, 1418 say they have started paying bills online in the last year. Construct a 99% confidence interval for the population proportion. Interpret the results.A survey was done of 55 Lake Tahoe residents to see how many times they went to a Lake Tahoe beach last summer. The 95% confidence interval for the mean was found to be (3.1,7.2). Then we can be 95% confident that these 55 Tahoe residents went to the beach on average between 3.1 and 7.2 times last summer. True or false?
- In a survey of 74 US females, 56 said they had gone to the dentist within the past year. What is the UPPER endpoint of a 95% confidence interval for the population proportion? What is the LOWER endpoint of a 95% confidence interval for the population proportion?As of November 2010, three Spider-Man movies have been released, and their mean length is 120 minutes. Someone claims that the mean length of Spider-Man movies is actually less than the mean length of all foreign language movies. Does the confidence interval contradict this claimIn 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the assassination of President Kennedy, and found that 634 believe there was a conspiracy ("Gallup news service" 2013). What is the Estimate of proportion of Americans who believe in this conspiracy using a 90% confidence interval?
