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Unformatted text preview: Intervals and Hypothesis Testing for Population Hypothesis Testing for Population Means Hypothesis Testing for One Population Mean
Comparing Two Means for Two Independent Populations
Comparing Two Means for Two Dependent Populations Summary of ttest Conﬁdence Intervals and Hypothesis Testing for Population Hypothesis Testing for Population Means Hypothesis Testing for One Population Mean
Comparing Two Means for Two Independent Populations
Comparing Two Means for Two Dependent Populations Example 1 (by hand) Data are given in summaried
format: measures of a
manual agility for men and
women
Male Female
n
65
65
Mean 19.31 18.24
SD
2.24
3.14 Questions
A. Find a 95% CI for the
positive diﬀerence in the
means for the two groups
B. What does this interval
suggest about genderbased
diﬀerence in manual agility? Conﬁdence Intervals and Hypothesis Testing for Population Hypothesis Testing for Population Means Hypothesis Testing for One Population Mean
Comparing Two Means for Two Independent Populations
Comparing Two Means for Two Dependent Populations Example 1 (cont’d)
2
2
σ1 = σ2 A. 95% CI
¯
¯
1
Y1 − Y2 = 1.07
2 3 ∗
df =? ====> tdf = ¯
¯
SE (Y1 − Y2 ) = 2
2
s1 s2
+=
n1 n2 = 0.4784 4 ∗
¯
¯
Y1 − Y2 ± tdf 2
2
s1 s2
+
=
n1 n2 = (0.12, 2.02) B. Does the interval contain zero? Based on the interval
above we are 95% conﬁdent in our conclusion that the mean
score for males is between
and
higher than the
Conﬁdence Intervals and Hypothesis Testing for Population
mean score for females. Hypothesis Testing for Population Means Hypothesis Testing for One Population Mean
Comparing Two Means for Two Independent Populations
Comparing Two Means for Two Dependent Populations Comparing Means for Two Dependent or
Correlated Samples (Paired Samples) Conﬁdence Intervals and Hypothesis Testing for Population Hypothesis Testing for Population Means Hypothesis Testing for One Population Mean
Comparing Two Means for Two Independent Populations
Comparing Two Means for Two Dependent Populations Objectives Upon com...
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This test prep was uploaded on 03/12/2014 for the course STATS 10 taught by Professor Ioudina during the Spring '08 term at UCLA.
 Spring '08
 Ioudina

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