Question

Practice Problems
		SIBNUM	work	age	RELSTAT	DRKFRQ
	Mean	1.75	9.65	22.6	2.13	3.04
	Std. Deviation	1.117	9.20	2.4	1.124	0.77
	Minimum	0	0	2	1	1
	Maximum	6	40	45	6	5

1. Using the 50-35-14-2 rule, sketch each of the distributions above.

2. For each variable, calculate the value of X at the 40^th %ile and the 61^nd %ile.

3. For each variable, calculate the %ile corresponding to a score of 4 on the variable.

4. 2013 SAT subscores for the nation are given below.

A) For the composite, what score do you need to qualify for Mensa, which requires you to be in the top 2% of the population?

B) Oddly enough, Phillip scored exactly 500 on each subscore… what percent of students scored higher in each subscore? What percent of students scored LOWER than his composite score of 1000?

C) MU admissions accept a 1080 composite score as sufficient to demonstrate potential success as a student. What percent of students qualify?

D) The MU honor’s college accepts incoming freshmen with a composite SAT of 1380 (if you were ALSO top 15%ile of high school class). What percent of students qualify with that composite score?

Subscore	Reading	Math	Writing	Composite
Mean	413	556	468	1010
SD	114	117	113	231

Answer 1

First question not clear.

The second question solved completely.

A) For the composite, what score do you need to qualify for Mensa, which requires you to be in the top 2% of the population?

B) Oddly enough, Phillip scored exactly 500 on each subscore… what percent of students scored higher in each subscore? What percent of students scored LOWER than his composite score of 1000?

Scored more in reading

scored more in Maths

Scored more in Writing

Socred lower than a composite score of 1000

C) MU admissions accept a 1080 composite score as sufficient to demonstrate potential success as a student. What percent of students qualify?

D) The MU honor’s college accepts incoming freshmen with a composite SAT of 1380 (if you were ALSO top 15%ile of high school class). What percent of students qualify with that composite score?