Question 12 of 14

Archeologists have studied sizes of Egyptian skulls in an attempt to determine whether breeding occurred between different cultures. Listed below are the widths (mm) of skulls from 150 A.D. Construct a 90% confidence Interval estimate of the mean skull width

127.7    138.1    126.4    131.9    143.4    134.9    138.6    128.7 

____ mm < < mm ____ 

(Round to two decimal places as needed.)

Use the sample data and confidence level given below to complete parts (a) through (d).

A research institute poil asked respondents if they felt vulnerable to identity theft. In the poil. n=1089 and x=570 who said ''yes. ''Use a 99% confidence level.

Click the icon to view a tabie of z scores.

(a) Find the best point estimate of the population proportion p.

a. find the best point estimate of the population proportion p.(Round to three decimal places as needed.)

b. Identify the value of the margin of error(Round to three decimal places as needed.)

c. Construct the confidence interval(Round to three decimal places as needed.)

d. write a ststement that correctly inteprets the confidence interval(Round to three decimal places as needed.)

Use Rstudio if possible to answer the question. Show the R code and explanation if you use R.

Need answer for parts a) and c) only, for part c), construct 95% (instead of 99%) simultaneous confidence intervals for the pairs of mean components. Also, compute 95% Bonferroni Confidence intervals for the 3 pairs of mean components.