In a study to find the proportion of children with asthma in a certain population we...
3. Fill in the blanks (show your work by drawing or using certain formula). a) (2 points) To form a 96% confidence interval for population proportion, 2.4 b) (2 points) To form a 98% confidence interval for population mean using a sample size of 26, to c) (2 points) For a 99% confidence interval with margin of error 0.03 with a prior estimate 0.65 of the sample proportion p in estimating population proportion p, we need to have sample size...
Case Study 2: Suppose we know that the prevalence of asthma among American children is 11%. Researchers conducted a study among 600 children in Boston and found that 56 had asthma. 9. Calculate the 95% confidence interval for the prevalence of asthma among children in Boston:
6. We want to determine the sample size for estimating the population proportion p that would vote for candidate A with a 95% confidence interval and a margin of error of no greater than 2 %. What is the sample size given that we have no fore knowledge so that p should be a value of 0.5 or 50%?
11. [6 points] Using a sample of 100 children, a 95% confidence interval for the proportion of children under the age of 18 who had asthma was constructed to be (0.085,6.23) a) Which of the following would produce a confidence interval which is narrower than the constructed 95% confidence interval? Sample 150 children rather than 100, (Maintain the confidence level at 95%) Sample only 80 children rather than 100, (Maintain the confidence level at 95%) . (b) Which of the...
Find the minimum sample size required to estimate a population proportion with a margin of error equal to .04 and a confidence level of 90%. A recent study resulted in a sample proportion of .70. ALSO determine the minimum sample size if no prior study was done.
A) A certain region would like to estimate the proportion of voters who intend to participate in upcoming elections. A pilot sample of 25 voters found that 17 of them intended to vote in the election. Determine the additional number of voters that need to be sampled to construct a 95% interval with a margin of error equal to 0.06 to estimate the proportion. The region should sample ____ additional voters. B) Determine the sample size needed to construct a...
Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: two percentage points; confidence level 95%; from a prior study, ModifyingAbove p with caret is estimated by the decimal equivalent of 48% nequals nothing (Round up to the nearest integer.)
33. Find the z-score used in the formula to construct a 92% confidence interval for a population proportion: O a. 1.4051 Ob. 1.5548 Oc. 1.7507 Od. 1.96 34. All of the following are TRUE about 95% confidence intervals for a population mean except ::* O a. The population mean may or may not be in the confidence interval. Ob. The value of T varies depending on sample size. Oc. If the sample size is large, the Central Limit Theorem says...
Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.09; confidence level: 90%; from a prior study, (p-hat) is estimated by 0.17.
24. Find the minimum sample size required to estimate a population proportion with a margin of error = 0.05 a confidence level of 90%, and from a prior study, p is estimated to be .25 (a) 203 (b) 329 (c) 247 (d) 396 (e) 289 25. In a survey of 385 students at Broward College, North Campus, results revealed that 154 students were born outside of the USA. Construct a 96% confidence interval estimate for the proportion of students who...