by Dawn Wright | Oct 3, 2018

Question: I have hit the wall on a simple problem. I seem to be hitting these more often now. At any rate. 8.1.11, the difference between two means hypothesis test standardized test statistic requires µ1 – µ2. So, how does one calculate this when we are never...
by Dawn Wright | Apr 15, 2018

Many students struggle to find critical values of z, t, and Chi-square for hypothesis tests. No matter how often I show them how to use the StatCrunch calculators to do this, they gravitate back to the tables. And make a lot of mistakes. To help a bit, I have created...
by Dawn Wright | Apr 9, 2017

Consider the following problem statement: An article in an online magazine states that 40% of home buyers found their real estate agent through referrals by a friend. However, a professor in a local college sampled 1000 home buyers and found that 426 chose an agent...
by Dawn Wright | Feb 17, 2016

[embedyt] http://www.youtube.com/watch?v=fgbChDkU4sQ[/embedyt] A quick and easy way to know whether you have a right-tailed, left-tailed, or two-tailed hypothesis test.