Why might a researcher choose purposive sampling over systematic sampling? purposive sampling is always cheaper. b. external validity is not vital to the researcher's study. c. only purposive sampling allows the researcher to study a particular type of participant. d. the researcher does not have to specify a population of interest ahead of time.

c

step-by-step explanation:

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;

false

ok

hope this

well since the real answer is 8.9 i guess the estimation would be 9