a random and independent sample of 4000 students 35% of them were in favor of more online courses. What is the multiplier for the 90% confidence interval level?

Out of a survey of 900 adults, 567 said that teenagers were more dangerous drivers than senior citizens. Construct a 99% confidence interval for p.

A newspaper article stated that the US Supreme Court received 812 letters from around the country on the subject of whether to ban cameras from the courtroom. Of these 812 letters, 800 expressed the opinion that cameras should be banned. A statistics student was going to use this sample information to estimate a 95% confidence interval for the true proportion of all American adults feel that cameras should be banned from the courtroom. what is the 95% confidence interval?

Identify the t- scores for a 99% confidence interval if the sample size is 70?

A random survey of 150 CBC students found that 35 of them intended to transfer to WSU Tri-Cities upon completing their AA degree. Construct a 95% confidence interval for the proportion of CBC students intending to transfer to WSU Tri-Cities. Give your answer as a complete sentence in the context of the problem.

if n = 42, p = 0.6 then construct the 98% confidence interval for the population proportion.

In a study of treatments for very painful​ "cluster" headaches,... Find the 90% confidence interval using technology.

Of 130 adults selected randomly from one town, 25 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.