Life satisfaction in older adults with morbidity. A study in Psychogeriatrics (2020), the official journal of the Japanese Psychogeriatric Society, examined the moderating effect of gender on life satisfaction in older adults living with morbidity and multimorbidity in Malaysia. A sample of 850 males and 940 females aged 60 to 92 years was used in the analysis.

a. Which of the procedures described in Chapter 8 could be used to estimate the difference in mean life satisfaction between male and female older adults?

b. Propose a regression model involving the qualitative independent variable gender of older adult that could be used to investigate the difference between the means. Be sure to specify the coding scheme for the dummy variable in the model.

c. Explain how the regression model you developed in part b could be used to estimate the difference between the population means