Exam DA0-001 topic 1 question 69 discussion

Actual exam question from CompTIA's DA0-001

Question #: 69
Topic #: 1

Randy scored 76 on a math test, Katie scored 86 on a science test, Ralph scored 80 on a history test, and Jean scored 80 on an English test. The table below contains the mean and standard deviation of the scores for each of the courses:

Using this information, which of the following students had the BEST score?

A. Randy
B. Katie
C. Ralph
D. Jean

Show Suggested Answer

Suggested Answer: B 🗳️

by Correct_Damage at April 8, 2023, 7:10 p.m.

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Swift_and_Quick

7 months, 3 weeks ago

A. Randy. For Randy in math: Z-score = (76 - 70) / 2 = 3 For Katie in science: Z-score = (86 - 80) / 3 = 2 For Ralph in history: Z-score = (80 - 75) / 2 = 2.5 For Jean in English: Z-score = (80 - 90) / 1 = -10 Randy has the highest Z-score.

upvoted 2 times

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Correct_Damage

1 year, 8 months ago

Also : observed - mean divided by standard deviation = the same answer B

upvoted 2 times

yandieg

1 year, 6 months ago

so, according to your formula, is A. Randy For Randy in math: z_math = (76 - 70) / 2 = 3 For Katie in science: z_science = (86 - 80) / 3 = 2 For Ralph in history: z_history = (80 - 75) / 2 = 2.5 For Jean in English: z_english = (80 - 90) / 1 = -10

upvoted 3 times

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Correct_Damage

1 year, 8 months ago

B. Kind of think this is a trick question. Assuming the test score could be between 0-100, the highest score would be the best scare regardless of the subject the test was in or how well other students not in the table did.

upvoted 1 times

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