The Next Questions Are Based on the Following Information

Multiple Choice

The Next Questions Are Based On The Following Information:
The manufacturer of a new chewing gum claims that at least 80% of dentists surveyed prefer their type of gum and recommend it for their patients who chew gum.An independent consumer research firm decides to test their claim.The findings in a sample of 200 dentists indicate that 74.1% of the respondents do actually prefer their gum.
-If conducting a two-sided test of population means,unknown variance,at level of significance 0.05 based on a sample of size 20,the critical t-value is:

A) 1.725
B) 2.093
C) 2.086
D) 1.729