HW8 - Stat 3011 Homework 8 Stat 3011: Homework 8 Due:...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Stat 3011 Homework 8 Stat 3011: Homework 8 Due: Tuesday, March 31st Directions: See the homework website for general directions. Assigned Exercises: 1. 8.28 (page 383) (a) book part a (Recall that the standard error is s/ n .) (b) Show that the 95% confidence interval for μ , the true mean ideal number of kids for males, is (2.94, 3.17). (c) Interpret the confidence interval from part b. 2. 8.30 (page 383) Directions for Rweb are given on the next page. (a) Use Rweb to create a stem-and-leaf plot of the weight change data. (b) Check the two assumptions needed for the confidence interval. Does it appear that they hold? (c) Use Rweb to calculate x , the sample mean, and s , the sample standard deviation for the weight change data. (d) Use your answers to part c to calculate a 95% confidence interval for μ , the true popu- lation mean change in weight for family therapy. (e) Use the “t.test” function in Rweb to verify your answer to part d. (f) Explain why the interval in part d suggests that the true mean change in weight is
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

HW8 - Stat 3011 Homework 8 Stat 3011: Homework 8 Due:...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online