Answer: d. 0.60
Step-by-step explanation:
When are performing sample surveys , when the selected participant is giving any response is denoted as non - response.
The proportion of these participants of the sample is known as the non-response rate.
Given : A political scientist wants to know how college students feel about the social security system.
She obtains a list of the 3114 undergraduates at her college and mails a questionnaire to 250 students selected at random.
i.e. Sample size : n= 290
Only 100 of the questionnaires are returned.
Individual gave response =100
Individual gave no-response =250-100 =150
The rate of non-response [tex]=\dfrac{\text{Individual gave no-response}}{n}[/tex]
[tex]=\dfrac{150}{250} =0.60[/tex]
Hence, the rate of non-response would be 0.60 .
Thus , the correct option is d. 0.60.
