scores-on-a-standardized-math-test-are-normally-distributed-with-a-mean-of-7070-

Question

Scores on a standardized math test are normally distributed with a mean of $70$ and a standard deviation of $10$ . A randomly selected student scored $55$ on the test.

(a) What is the $z$ -score corresponding to the student’s score?

(b) Based on the $z$ -score, would this score be considered unusual?

Accepted Answer

(a) $70$

(b) No

Answer

(a) $70$

(b) Yes

Answer

(a) $70$

(b) No

Answer

(a) $70$

(b) Yes

Scores on a standardized math test are normally distributed with a mean of 7070 and a standard deviation of 1010. A randomly selected student scored 5555 on the test.(a) What is the zz-score corresponding to the student’s score?(b) Based on the zz-score, would this score be considered unusual?