a) What is the lower endpoint of this confidence interval? b) What is the upper endpoint of this confidence interval? c) Based on the confidence interval, you would reject, at 5% level of significance, the hypothesis that the two samples are from populations with equal variance?

The z value for a 96.6% confidence interval estimate is?

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

Early-childhood-development studies indicate that the more often a child is read to from birth, the earlier the child begins to read. A local parents’ group wants to test this theory and samples families with young children. They find the following results. Construct a 99% confidence interval to estimate the true difference between the proportions of children who read at an early age when they are read to frequently compared to those who were read to less often, as described in the table of results. Let Population 1 be the children who were read to frequently and Population 2 be the children who were read to less often. Round the endpoints of the interval to three decimal places, if necessary.  Ages when Children Begin to Read   Read to at Least Three Times per Week Read to Fewer than Three Times per Week Started Reading by age 4 60 35 Started Reading after age 4 36 51   Lower end point: Upper end point:

According to a Field Poll, 263 out of 569 of California adults feel that "education and our schools" is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education and the schools is one of the top issues facing California. The error bound is ___________  rounded to 4 decimal places.

2.

• Example: A sample of 25 physically and mentally healthy males participated in a sleep experiment in which the percentage of each participant's total sleeping time spent in a certain stage of sleep was recorded. • The variance computed from the sample data was 2.25. Construct 95 percent confidence intervals for o².