Friday

March 6, 2015

March 6, 2015

Posted by **joane** on Wednesday, October 24, 2012 at 7:54pm.

test are normally distributed with a mean of 500 and a standard deviation of 100.

Tom wants to be admitted to this university and he knows that he must score

better than at least 70% of the students who took the test. Tom takes the test and

scores 585. Will he be admitted to this university?

^ I already did this question and I got 80.23%

but I need help with the other questions that go with this :

2) For the same test, consider Sarah, whose score is 683. What is her

a) Z score

b) T score

c) Percentile rank

d) What percentage of people scored between Sarah and the mean? How many

people were ahead of her? (Clue: use the Z table).

e) If the mean on the test were 550 and the Sd = 50, what would be Tom and

Sarah’s scores? Would either of them qualify for the University now?

- statistics! -
**PsyDAG**, Thursday, October 25, 2012 at 1:21pmI did not check #1.

2. Z = (score-mean)/SD

Z = (683-500)/100 (calculate)

T = 50 + 10Z

Percentile rank = proportion ≤ score

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores for c, d and e.

- statistics! -
**Halima**, Sunday, October 5, 2014 at 11:18pmhelp me

**Answer this Question**

**Related Questions**

statistics - Entry to a certain University is determined by a national test. The...

statistics - the admissions policy at a certain university requires that ...

statistics - the admissions policy at a certain university requires that ...

statistics - the dean of admissions in a large university has determined that ...

statistics - Ram earned a score of 940 on a national achievement test. The mean ...

Word Problem - A math teacher gives two different tests to measure students' ...

statistics - Suppose it is known that the average score of all high school ...

statistics - The scores on a national achievement test are normally distributed ...

stats - Test scores on a university admissions test are normally distributed, ...

statistics - Scores on a national writing exam are approximately normally ...