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STA 3024
Assignment 1
1. Suppose that, based on a random sample of 148 UF graduates with a certain major, a 95%
conﬁdence interval for the average starting salary (in thousands of dollars) for people with
this major is (69
.
8
,
74
.
8)
.
True or false:
We are 95% conﬁdent that the average starting
salary of all UF graduates with this major is between $69
,
800 and $74
,
800
.
2. A sample space consists of 68 outcomes, all of which are equally likely. There are 13
outcomes in
A
, 10 outcomes in
B
, and 2 outcomes in both
A
and
B
.
(a) Calculate
P
(
B

A
)
.
(b) Are
A
and
B
independent?
3. Out of 1200 randomly selected Floridians, 44% say they are “very concerned” about
global warming. From this, an environmental group estimates that 44% of all Floridians
are “very concerned” about global warming. Identify the population, sample, parameter,
and statistic that are relevant to this situation.
4. We want to conduct a hypothesis test to see if a particular coin is fair, meaning that it is
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This note was uploaded on 03/27/2012 for the course STA 3024 taught by Professor Ta during the Spring '08 term at University of Florida.
 Spring '08
 TA
 Statistics

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