Identify the y-score for a95% confidence interval if the sample size is 50.

A recent survey showed that 42% of US employers were likely to require higher employee contributions for health care coverage. Suppose the survey was based on a sample of 500 companies. Find the 99% confidence interval for the proportion of all companies likely to require higher employee contributions for health care coverage. (Round to four decimal places)

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

Do Construct a confidence interval on a slope?

c=99 o= 3 n= 11 what is 99% confidence interval?

How can you make a 95% confidence interval smaller without changing the confidence level?

The mean score on the math portion of the ACT for the year 2000 is μ = 20.7. A sample of 20 students in a local school district had a mean of 22.95. Using the sample, a 95% confidence interval estimate for the mean is (20.76, 25.14).  State the point estimate for the mean ACT score for students. Based on this sample information , do you believe that the local students have a mean different from the general population? Why?     22.95 is in the center of the interval. The means are definitely not different.     22.95 is just outside the 95% confidence interval. Can't say the means are really different.     22.95 is not equal to 20.7. The means are definitely different.     20.7 is just outside the 95% confidence interval. Can't say the means are really different.

A random sample of high school seniors were asked whether they were applying for college. The resulting confidence interval for the proportion of students applying for college is (0.65,0.69). What is the margin of error?

Researchers are studying whether the proportion of homeschooled children in district 1 (considered 1) is less than the proportion of homeschooled children in neighboring district 2 (considered as 2). To test the theory info was gathered: district 1 had 600 students of which 90 were homeschooled. District 2 had 550 students of which 99 were homeschooled. What is the 95% confidence interval for the difference proportion between district 1 and 2? A. (-0.086, 0.026) B. (0.143, 0.217) C. (0.113, 0.187)

What is the lower bound of the confidence interval? A 98% confidence interval for the data: 25, 38, 62, 45, 61, 38, 21, 42, 31, 35. Round to 2 decimal places.