Answer: 0.84
Step-by-step explanation:
let p be the population proportion of adults who smoked a cigarette in the past week.
As per given , we have

Sample size : n= 1491
The sample proportion of adults smoked a cigarette= 
The test statistic for proportion is given by :-

Substitute all the values , we get

Hence, the value of the test statistic = 0.84
Arrange in ascending order:-
3, 5, 23, 27, 35, 37, 45, 48, 49
There are 9 values so the median = middle 5th value
= 35 Answer