Consider the partial data set in the table represent online hours spend shopping by age and income. The average and standard deviation for the full data set are $47,667 and $14,292 respectively. Using...

Consider the partial data set in the table represent online hours spend shopping by age and income. The average and standard deviation for the full data set are $47,667 and $14,292 respectively. Using z-scores to standardize the observations, What is the average standard deviation of the income for the three provided?

A. 1.003

B. 0.7320

C. 0.2410

D. 0.6997