Astudent scores 74 on a geography test and 249 - id742491748470, swagmonstah24

Ответ:

babra

30.12.2021

In geography test.

Step-by-step explanation:

We have been given that a student scores 74 on a geography test. The geography test has a mean of 80 and a standard deviation of 5. The student scores 249 on a mathematics test. The mathematics test has a mean of 300 and a standard deviation of 34.

Let us find z-scores for both data points. The z-score tells that a data point is how many standard deviation above or below mean.

$z=\frac{x-\mu}{\sigma}$ , where,

z = z-score,

x = Sample score,

$\mu$ = Mean,

$\sigma$ = Standard deviation.

$z=\frac{74-80}{5}$

$z=\frac{-6}{5}$

z=-1.2

Let us find z-score for mathematics test score.

$z=\frac{249-300}{34}$

$z=\frac{-51}{34}$

z=-1.5

Since z-score for geography test is -1.2 , so student was 1.2 standard deviation below mean.

Since z-score for mathematics test is -1.5 , so student's score was 1.5 standard deviation below mean.

Therefore, the student did better on geography test relative to the other students in each class.

0,0(0 оценок)

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Mathematics

Ask an AI advisor a question