Calculate and interpret Cohen’s d for the difference in the mean duration of the celebrity marriages in Chapter 1 (Question 9) and mine and my friends’ marriages in Chapter 2 (Question 13).

Chapter 1 Question 9

Celebrities always seem to be getting divorced. The (approximate) lengths of some celebrity marriages in days are: 240 (J-Lo and Cris Judd), 144 (Charlie Sheen and Donna Peele), 143 (Pamela Anderson and Kid Rock), 72 (Kim Kardashian, if you can call her a celebrity), 30 (Drew Barrymore and Jeremy Thomas), 26 (W. Axl Rose and Erin Everly), 2 (Britney Spears and Jason Alexander), 150 (Drew Barrymore again, but this time with Tom Green), 14 (Eddie Murphy and Tracy Edmonds), 150 (Renée Zellweger and Kenny Chesney), 1657 (Jennifer Aniston and Brad Pitt). Compute the mean, median, standard deviation, range and interquartile range for these lengths of celebrity marriages.

Chapter 2 Question 13 

In Chapter 1 (Question 9) we looked at the length in days of 11 celebrity marriages. Here are the approximate lengths in months of nine marriages, one being mine and the others being those of some of my friends and family. In all but two cases the lengths are calculated up to the day I’m writing this, which is 20 June 2023, but the 3- and 111-month durations are marriages that have ended – neither of these is mine, in case you’re wondering: 3, 144, 267, 182, 159, 152, 693, 50 and 111. Calculate the mean, standard deviation and confidence interval for these data.

Data From Question 9  Chapter 1 

Celebrities always seem to be getting divorced. The (approximate) lengths of some celebrity marriages in days are: 240 (J-Lo and Cris Judd), 144 (Charlie Sheen and Donna Peele), 143 (Pamela Anderson and Kid Rock), 72 (Kim Kardashian, if you can call her a celebrity), 30 (Drew Barrymore and Jeremy Thomas), 26 (W. Axl Rose and Erin Everly), 2 (Britney Spears and Jason Alexander), 150 (Drew Barrymore again, but this time with Tom Green), 14 (Eddie Murphy and Tracy Edmonds), 150 (Renée Zellweger and Kenny Chesney), 1657 (Jennifer Aniston and Brad Pitt). Compute the mean, median, standard deviation, range and interquartile range for these lengths of celebrity marriages.