Christina is the newest intern hired in the accounting department. According to her high school records, Christina scored a 650 on her math SAT. The mean score and deviation are 450 and 100, respectively. How many standard deviations above the mean did Christina score?

Question

Quizplus · Accepted Answer

Christina's score is 2 standard deviations above the mean.
Key Takeaway: To calculate how much a data point deviates from the mean, it is important to calculate the Z-statistic as seen in the formula below. Using this formula, Christina scored 2 standard deviations above the mean so would not be considered an outlier.
Z = (650 - 450)/100 = 2

Christina Is the Newest Intern Hired in the Accounting Department