Blog

You’re getting ready to put your fourth-graders into cooperative learning teams to work on a project. What considerations must you make as you assign students to various groups?

When should you use a two –sided p-value?

The boy in “Chickamauga” is revealed to be:

What is the name of the concept that Kahneman described while working with the Israeli air force trainers? 

In the Monty Hall Problem, your overall odds of winning the car if you switched from the door that you originally picked when one of the 3 doors was shown was 1/3.

In the standard normal distribution table, a Z score of 2.40 is further from the 50% cumulative percent of the distribution than a Z score of -0.20.

The σ controls the central location of the distribution.

All else being equal, increasing the sample size will widen the 99% CI for a sample mean?

In a binomial distribution, if n=10, p=.3 and q=.7 and where n*p*q= 2.1 would you use a normal approximation?

Researchers are conducting a population-based study to determine the prevalence of COVID-19 antibodies.  To do this they are first dividing the population by socio-economic status and sampling with these socio-economic status groups. What kind of sampling is this?