Jeremy Doncouse
ID: 92575
3
MATH116
4
2
What is meant by Type I error? Type I error means that you reject the null hypothesis
when it is true. What is a Type II error? A Type II error means you accept the null
8
hypothesis even though it is false. They are both errors which occur based on poor
judgement or poor choice of samples which negatively affect the outcome of the testing.
4
Explain the difference between a 1tailed and 2tailed test. A 1tailed test means the
alternative hypothesis is either greater than or less than the null hypothesis, but a
2tailed test means the alternative hypothesis simply does not equall the null
hypothesis.
6
What symbols are used to represent the null hypothesis and the alternative hypothesis?
equals the null hypothesis, while
equals the alternative.
8
What is meant by significant difference? A significant difference is the range of values
that fall within the critical or rejection region. This is the range of values that indicate that
the null hypothesis should be rejected.
10
List the steps in hypothesis tesing.
10
1
State the hypothesis and identify the claim.
2
Find the critical value(s) from the appropiate table in Appendix C.
3
Compute the test value.
4
Make the decision to reject or not reject the null hypothesis.
5
Summarize the results.
2
It has been reported that the average credit card debt for college seniors is $3,262. The
student senate at a large university feels that their seniors have a debt much less than
this, so it conducts a survey of 50 randomly selected seniors and finds the average debt
senate correct?
a
b
c
Section 8.3
Section 8.1:
(Page 410) 2,4,6,8,10,12,13 (any 5)
Section 8.2:
(Page 420) 2,4,6,8,12,15,16
Section 8.3:
(Page 432) 3(ah: any 4),4(ah: any 4),8,10,12
Section 8.4:
(Page 440) 2,4,6,8,12,15,16 (any 5)
Section 8.5:
(Page 451) 1(ah: any 4), 2(ah: any 4),4,6,12
Section 8.1:
(Page 410) 2,4,6,8,10,12,13 (any 5)
Section 8.2:
(Page 420) 2,4,6,8,12,15,16
is $2,995, and the population standard deviation is $1,100. With ά = 0.05, is the student
0
H
1
H
262
,
3
$
:
0
=
μ
H
262
,
3
$
:
1
<
H
72
.
1
56
.
155
267
50
100
,
1
$
262
,
3
$
995
,
2
$

=

=

=
z
65
.
1
05
.
0

=
=
α