## Exam Information

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## Sample Document Text

1.
2.
3.
4.
Given the values 9, 4, 4, 1,3,6. What is the 70
th
percentile?
a. 4.2
CE:])
c. 5
d. 4
e. 3
f. 1
L ~(
f. . ..
A questionnaire about study habits was given to a random sample of students
taking a large introductory statistics class. The sample of 25 students reported
that they spent an average Of 80 minutes per week studying statistics. Assume
that the population standard deviation is 35 minutes. What is the 92%
confidence,m.,teo::al for the average time studying?
.,..J. .... - . ~
ca::.{~ZJ5-.. ()1721r 39~~~
b. (68.49,91.52) r
c. (67.82,92.18)
d. (67.68,92.32)
e. (66.28, 93.28)
The population standard deviation was used to make the following 95%
confidence interval (4.02,5.98). What is the 90% confidence interval?
~ __ (4.12Q_,2, 8 80)
C!L.....(±..1]~.>J~~ .. ::>
c. (4.360,5.640)
d. (3.713,6.288)
f(x,y) = 2 where 0< y < x < 1. What is fXI
Y
?
rf.) l/(l-y) (A( /...., _ 1.,,1 '1
~ l/x ~ )y L -~,
c. 1 ()
<;K ".
LX. I 7 .... - ...

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