In a Gallup Poll of 1005 individuals, 452 thought they were worse off financially than a year ago. Find the 95% confidence interval for the true proportion of individuals who feel they are worse off financially.
Answer to relevant QuestionsIn a poll of 1000 likely voters, 5 60 say that the United States spends too little on fighting hunger at home. Find a 95% confidence interval for the true proportion of voters who feel this way. Nearly one-half of Americans aged 25 to 29 are unmarried. How large a sample is necessary to estimate the true proportion of unmarried Americans in this age group within 21⁄2 percentage points with 90% confidence? The proportion of students in private schools is around 11%.Arandom sample of 450 students from a wide geographic area indicated that 55 attended private schools. Estimate the true proportion of students attending private ...A meteorologist who sampled 13 thunderstorms found that the average speed at which they traveled across a certain state was 15 miles per hour. The standard deviation of the sample was 1.7 miles per hour. Find the 99% ...Find the values for each. a. t a / 2 and n = 18 for the 99% confidence interval for the mean b. t a / 2 and n = 23 for the 95% confidence interval for the mean c. t a / 2 and n = 15 for the 98% confidence interval for the ...
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