I'm taking a first course in statistics. I have been given a dataset with the number of companies falling into different categories of revenues (in thousands of euros):
<1 64108 1-39 73121 40-99 67532 100-399 68613 400-1999 33760 2000-9999 10293 10000-39999 2493 40000-199999 779 200000-infinity 235
Now I was asked to count the lower quartile and how much the revenue should be if a company belonged to the two highest deciles.
Is it reasonable to assume that the revenue of those 235 companies is 200,000 thousand euros? And does the 39 mean 39,000 euros so if one of those 73,121 companies has revenue 39,600, it actually belongs to the range 40-99? By assuming the data is uniformly distributed, I can modify the data such that I know how many companies belongs to every class but is this a standard way to do such problems?