{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Testing_for_Means 9.1-9.5

# Youtubecomwatchvti6mdx3s0zk condence intervals and

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: hesis Testing for One Population Mean Comparing Two Means for Two Independent Populations Comparing Two Means for Two Dependent Populations The t-table 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 Using the t-table How to use the t − table : http://www.youtube.com/watch?v=tI6mdx3s0zk 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 Conﬁdence Interval S x ± tα /2,n−1 · √ ¯ n 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 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 Overview of Comparing Two Means Consider two populations (groups) having means 2 2 and variances (µ1 , σ1 ) and (µ2 , σ2 ) respectively. We are interested in the comparing the means µ1 − µ2 . Suppose two samples of size n1 and n2 are drawn independently from each population. 2 ¯ ¯ Let Y1 and Y2 denote the sample means and s1 2 and s2 denote the sample variances. ¯ For large samples, the random variables, Y1 and ¯ Y2 , are approximately normal. ¯ ¯ Thus the random variable Y1 − Y2 is also Conﬁdence approximately normal, that is 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 Assumptions and Conditions Independence Assumption: Randomization: the data are collected randomly 10% of...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online