Question

Consider the revised program and data below. What is the value of Count after the fourth observation is read?

data newnums;
set nums;
Count+Tens;
run;
a. Missing
b. 0
c. 30
d. 70

Answer 1

The value of Count after the fourth observation is read cannot be determined from the information provided, as the initial value of Tens and its values for the first four observations are unknown.

Step-by-step explanation:

To determine the value of Count after the fourth observation is read from the given SAS data step, we need to understand how the accumulation operator (also known as the sum statement) '+Tens' works in the context of the SAS data step 'data newnums; set nums; Count+Tens;run;'.

This operator will increment the value of Count by the value of Tens for each observation read. However, there's not enough information provided to know the values of Tens for each observation. Normally, unless initialized otherwise or retained, the variable Count would be set to 0 at the start of the data step. Without the initial value of Tens and the values for the first four observations, we cannot determine the value of Count after the fourth observation is read.