Urban demographics. A researcher claims that the number of people aged 60 years and above is projected to increase in the following year. The demographic changes expected to occur in the aged population is related to urbanization. It is expected that the proportion of the aged population will be higher in urban areas than in rural areas. This change in the demographic pattern will also inf luence the distribution of healthcare resources. Thus, the researcher studies a random sample of 51 people who stay in an urban area and documents their ages as shown in the following histogram.

a) Discuss the assumptions and conditions for using Student’s t inference methods with these data.

b) Do you think the confidence interval noted in the report is valid? Brief ly explain why or why not.

Transcribed Image Text:

Number of People 14 Age of People in Urban Areas 12 10 T 8- 6 4 2 0 0-10 11-20 21-30 31-40 41-50 51-60 61-70 71-80 Age