A study was conducted to determine if the percent of women who received financial aid is different form the percentage of men who receive financial aid. A random sample of students revealed the results shown in the table. Using (a=0.01), is there significant evidence to reject the null hypothesis? women men sample size number receiving aid 200 250. 300 225 a. Find the 90% confidence interval for the difference in financial aid rates between men and women and interpret this interval in the context of the problem. b. Write the two hypotheses for the problem. c. Compute the appropriate statistical hypothesis test and report the test statistic and p-value. Write the conclusion for the problem regarding the null hypothesis using statistical language. d.

A study of 420,048 cell phone users found that 137 of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0256​% for those not using cell phones. Complete parts​ (a) and​ (b).       a. Use the sample data to construct a 90​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.   enter your response here​%<p<enter your response here​% ​(Round to three decimal places as​ needed.) b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell​ phones? Why or why​ not?     A. No​, because 0.0256​% is included in the confidence interval.   B. Yes​, because 0.0256​% is included in the confidence interval.   C. Yes​, because 0.0256​% is not included in the confidence interval.   D. No​, because 0.0256​% is not…

Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)

A survey of 2450 golfers showed that 281 of them are left-handed. Construct a 90% confidence interval for the proportion of golfers that are left-handed. Question 10 options: (0.104, 0.125) (0.369, 0.451) (0.100, 0.130) (0.203, 0.293)

A study of 420 comma 026   cell phone users found that 140   of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0434 ​% for those not using cell phones. Complete parts​ (a) and​ (b).     a. Use the sample data to construct a 90​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell​ phones? Why or why​ not?

create a 90% confidence interval for the following data:  x = 25 n = 100

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:

2.