The mean score for all high school students taking a college entrance

exam is 500 with a standard deviation of 100. A study

is conducted to see whether a different mean applies to those

students born in foreign countries. For a random sample of

100 such students, the mean is 508 and the standard deviation

is 100.

What is the z score for this problem?

8

0.8

-0.8

0.008

-0.008

Do we retain or reject the null hypothesis? Retain or Reject

How would we interpret step 5?

Group of answer choices

Because we reject our null hypothesis, foreign born students have a statistically significant higher average college entrance exam score than the rest of the high school students.

Because we reject our null hypothesis, foreign born students have a statistically signficant lower average college entrance exam score than the rest of the high school students.

Because we reject our null hypothesis, foreign born students do not have a statistically significant difference in average college entrance exam score than the rest of the high school students.

Because we retain our null hypothesis, foreign born students have a statistically significant higher average college entrance exam score than the rest of the high school students.

Because we retain our null hypothesis, foreign born students do not have a statistically significant difference in average college entrance exam score than the rest of the high school students.

• Because we retain our null hypothesis, foreign born students have a statistically signficant lower average college entrance exam score than the rest of the high school students.