Friday
April 18, 2014

Homework Help: statistic

Posted by Sharon on Sunday, November 11, 2012 at 8:25pm.

. For each of the following, assume that the two samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the two sample means.
a. Each sample has n _ 5 scores with s2 _ 38 for the first sample and s2 _ 42 for the second. (Note: Because the two samples are the same size, the pooled variance is equal to the average of the two sample variances.)
b. Each sample has n _ 20 scores with s2 _ 38 for the first sample and s2 _ 42 for the second.
c. In part b, the two samples are bigger than in part a, but the variances are unchanged. How does sample size affect the size of the standard error for the sample mean difference?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

writing - When citing statistics from a web page in your speech you need to ...
statistics - mortgage broker is offering home mortgages at a rate of 9.5%, but ...
Statistic - A statistic instructor randomly selected four bags of oranges, each ...
College and Math Courses - Is statistic 243 equivalent to AP Statistic?
stats - Suppose i am interested in the average price of books at a bookstore. i ...
Animal Science - I need a statistic of how many dogs and cats are currently in a...
statistics - I need so help figuring out which statement is true or false. 1. A ...
statistic - will you help with my statistic class
statistic - For a two-tailed hypothesis test, the test statistic is z = 1.42. ...
statistic - Which of the following behave according to a power model? Select all...

Search
Members