A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high school seniors. The study examined the
scores of a random sample of 165 graduating seniors and found the mean score to be
515 with a standard deviation of 90. Determine a 95% confidence interval for the
mean, rounding all values to the nearest tenth.

Answer : (501,529)

Your answer to this question is true. hope this .

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

That’s really nice!

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