Posted by **Elise** on Friday, February 17, 2012 at 6:43pm.

Among first year students at a certain university, scores on the Verbal SAT follow the normal curve; the average is around 550 and the SD is about 100.

a) what percentage of these students have scores in the range 400 to 700?

b) There were about 1000 students with scores in the range 450-650 on the Verbal SAT. About _______ of them had scores in the range 500 to 600. Fill in blanks. Explain briefly

- Statistics -
**Nancy Jackson Miller**, Saturday, February 18, 2012 at 12:51am
a) Need to find P(400 < x < 700)= ?

z = (400 - 550)/100 = -1.5

z =(700 - 550)/100 = 1.5

P(400 < x < 700)= P(-1.5 < z < 1.5)

= 0.8663=86.36%(Ans.)

- Statistics -
**Nancy Jackson Miller**, Saturday, February 18, 2012 at 12:53am
a) Need to find P(400 < x < 700)= ?

z = (400 - 550)/100 = -1.5

z =(700 - 550)/100 = 1.5

P(400 < x < 700)= P(-1.5 < z < 1.5)

= 0.8663=86.36%(Ans.)

From: Tutor_Teddy

## Answer This Question

## Related Questions

- statistics - Every year thousands of students take the SAT'S. RECENT TRENDS SHOW...
- statistics - The box plot below summarize the distributions of SAT verbal and ...
- statistics - Suppose that on a certain examination in advanced mathematics, ...
- statistics - every year thousands of students take the SAT'S. Recent trends show...
- Statistics - Scores on the SAT verbal test in recent years follow approximately ...
- CRJ303-Statistics question - Re-worded from the "Study Questions" part of ...
- Statistics - Scores on the 1995 SAT verbal aptitude test among Kentucky high ...
- statistics - Sat scores l around the nation tend to have a mean score around 500...
- statistics - In a psychology class of 100 students, test scores are normally ...
- Statistics - SAT scores are distributed with a mean of 1,500 and a standard ...

More Related Questions