Chapter 10: Hypothesis Testing with Two Samples

________ for matched or paired samples: subjects are matched in pairs and differences are calculated.

________ and s2: the sample standard deviations, are estimates of σ1 and σ2, respectively.

________ or Pooled proportion: estimate of the common value of p1 and p2.

Two ________ (samples) are drawn from the same pair of individuals or objects.

________: A number that is equal to the square root of the variance and measures how far data values are from their mean.

Distribution: Student's ________ with degrees of freedom (variances not pooled)

________: X¯1−X¯2= the difference of the sampling means.

________: The test comparing two independent population means with unknown and possibly unequal population standard deviations.

The two ________ are simple random samples from two distinct populations.

X¯1−X¯2 = the difference of the sampling means

Student's t-distribution with degrees of freedom (variances not pooled)

A number that is equal to the square root of the variance and measures how far data values are from their mean

sample standard deviation

population standard deviation

The test comparing two independent population means with unknown and possibly unequal population standard deviations

the sample standard deviations, are estimates of σ1 and σ2, respectively

the unknown population standard deviations

the sample means

the population means

you can use the normal distribution to approximate the Student's t

measure of effect size based on the differences between two means

estimate of the common value of p1 and p2

Pa = Pb

subjects are matched in pairs and differences are calculated

n-1