Pls refer to the data which shows the resale flat applications under the document:

BUS105+_GBA+_resale.xlsx

1.Can I check if an histogram as a graphical presentation is any way possible to make some prelim observations?

Or line graph is the only graph possible in this case?

2. For 90% confidence intervals for the average number of 4-room and 3-room re-sale flat applications, respectively.

How do I analyse if there are 4 room flat applications than 3 room based on the confidence interval?

3.Which test of hypothesis should i use to decide if there is more 4-room re-sale flat applications than the 3-room re-sale flat applications

Is it t test or z test?

5. Also in this case, this data is it considered a sample data or population data?