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Unformatted text preview: RA 9299
Republic of the Philippines
June 25, 2004
NEGROS ORIENTAL STATE UNIVERSITY
GCL
NOPS (1907
NOTS (1927)
EVSAT (1968)
CVPC (1983)
Kagawasan Avenue. Dumaguete City, Negros Oriental, Philippines 6200
18019869
Phone: (83) (35) 225-9:400 For: 226-4751 Email p
4.
93, 67, 49, 55, 92, 77
a.
Range:
b. Standard Deviation:
c. Variance:
5.
-23, -17, -19, -5, -4, -11, -31
a. Range:
b. Standard Deviation:
c. Variance:
C. Round each z-score to the nearest hundredth.
1. A data set has a mean of x = 75 and a standard deviation of 11.5. Find the z-score for
each of the following.
a. x = 85
C. X = 50
b. x = 95
d. x = 75
2.
A data set has a mean of x = 212 and a standard deviation of 40. Find the z-score for each
of the following.
a. x = 200
C. x = 300
b. x = 224
d. x = 100
3.
A data set has a mean of & = 6.8 and a standard deviation of 1.9. Find the z-score for each
of the following.
a. x = 6.2
C. x =9.0
b. x = 7.2
d. x = 5.0
D. Solve the percentile of the following and round of the nearest percent.
1. On a placement examination, Rick scored lower than 1210 of the 12,860 students
who took the exam. Find the percentile for Rick's score.
Kevin scores at the 65" percentile on a test given to 9840 students. How many
students scored lower than Kevin?
Rene scored at the 84" percentile on a test given to 12,600 students. How many
students scored higher than Rene?
In 2015, the median family income in the United States was $66,650. (Source: U.S.
Census Bureau) If the 90th percentile for the 2015 median four-person family
income was $178,500, find the percentage of families whose 2015 income was
a. less than $66,650
b. more than $178,500
c. between $66,650 and $178,500
E. A survey was given to 18 students. One question asked about the one-way distance the
student had to travel to attend college. The results, in miles, are shown in the box below.
Use the median procedure for finding quartiles to find the first, second, and third quartiles
for the data.
Miles Traveled to Attend College
12
18
4
5
26
41
1
8
10
3
28
32
85
7
5
15
NEGROS ORINTAL STATE UNIVERSITY
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