The Bureau of Labor Statistics reported that the average yearly income of dentists in the year 2019 was $130,000. A sample of 36 dentists, which was taken in 2020, showed an av...
a) The sample mean income is expected to be exactly $130,000.
b) The sample mean income will be greater than $130,000 due to inflation.
c) The sample mean income will be less than $130,000 due to inflation.
d) The sample mean income can't be determined without knowing the sample data.