3 years ago

A study by the department of education of a certain state was trying to determine the

Mathematics

1 answer:

Step2247 [10]3 years ago

6 0

Answer:

(426 ; 468)

Step-by-step explanation:

Confidence interval :

Mean score ± margin of error

Margin of Error = 21

Mean SAT score = 447

Hence,

447 ± 21

Lower boundary = 447 - 21 = 426

Upper boundary = 447 + 21 = 468

(426 ; 468)

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