A company′s old antacid formula provided relief for 70% of the people who used it. The company tests a new formula on a sample of 200 patients to see if it is better. The sample finds 77% that felt relief. Does the evidence indicate the new formula is better? Use a 5% significance level.

Hi, please help me solve for the 95% confidence interval estimate. Thank you!

A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=935 and x=561 who said "yes." Use a 95% confidence level.

Use the sample data and confidence level given below to complete parts​ (a) through​ (d).   A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll, n=964 and x = 540 who said​ "yes." Use a 95% confidence level.

Michelle, a student studying music, randomly sampled fellow music majors and asked whether they listen to music while they study. The resulting confidence interval for the proportion of music students who listen to music while studying is (0.09, 0.26). What is the margin of error?

When a t-test is used to compare pre- and post-treatment data. What does the t-test reveal about the difference between baseline and treatment?

If you have a study design that requires two different samples, what sort of test might you consider?    Matched samples test    Independent samples test

A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 10% margin of error at a 90% confidence level, what is the sample size that is needed?Give your answer as a whole number.

A study compared the felt intensity of unrequited love among three groups​ - individuals who were currently experiencing unrequited​ love, those who had previously experienced unrequited love and described their experiences​ retrospectively, and those who had never experienced unrequited love but described how they thought they would feel if they were to experience it. The results of the study are summarized in the accompanying table. Determine the significance of the difference among​ groups, using the​ 5% level.    N 40 40 40 M 3.5 3.3 3.7 S2 5.3 5.8 4.8   1. What is th null hyp?  2.The comparison distribution will be an F distribution with df= ? and df=?  3.Determine the cutoff sample score on the comparison distribution at which the null hypothesis should be rejected for the data. At 0.05  the cutoff for F=? 4. Determine the​ sample's score on the comparison distribution for the data. F=?

You conducted a study to assess the effect of smoking on systolic blood pressure. The results showed that there was a significant association between the two variables, with an odds ratio of 1.5. Explain this finding to someone who has no background in epidemiologic research.