In a survey of 453 college seniors, it was found that 136 had changed their major at least once.

(a)What is the parameter of interest?

(b)Use StatKey to make bootstrap distribution (consisting of at least 5000 bootstrap samples) based on the sample data.Copy screenshots of the bootstrap dotplot and original sample box into your assignment.

(c)Find a 95% confidence interval for the parameter without using percentiles.In other words, compute the confidence interval as .

(d)Suppose a 98% confidence interval is desired instead of a 95% confidence interval.The lower endpoint of the confidence interval would be the ______ percentile of the bootstrap distribution, and the upper endpoint would be the ______ percentile of the bootstrap distribution.