Question 8 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
Tonya and Emily each have an online jewelry store. Let T represent the amount of money Tonya earns daily, and let E represent the amount of money Emily earns daily. The mean difference, D = T – E, of the amount of money that Tonya and Emily earn on a typical day is $312. What is the correct interpretation of this value?
Answer
A
On average, Tonya earns $312 daily.
B
Emily is earning $312 per customer, on average.
C
Tonya and Emily are each earning $312 on a typical customer.
D
On average, Tonya makes $312 more than Emily on a typical day.
Explanation
The mean difference is defined as D = T − E, so a positive value of $312 means Tonya’s daily earnings are $312 greater than Emily’s, on average. Thus, the correct interpretation is that Tonya makes $312 more than Emily on a typical day.
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