Blog

You have a data sample measuring the weights of backpacks with books in them.  The weights in pounds are 6.2, 7, 6.8, 9.1 and 4.3.  What type of data is this? (select all that apply)

A statistically significant correlation is evidence of a cause and effect relationship between two variables.

Determine and match what the key terms refer to in the following study: A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated last year.  

Match the statistical terms with their definition.

To calculate the standard deviation, you first must find the average of the squares of the deviations, also known as the

The graph above shows the number of cookies a sample of employees ate at their office party.  Use the graph to match the following measurements with their respective answers:

The highest quartiles and percentiles are always associated with the best outcomes.

Suppose x has a normal distribution with mean 50 and standard deviation 5. What percentage of x – values lie between 45 and 55?

Suppose we want to know the mean number of songs a consumer downloads a month from iTunes.  If the sample mean is 3 and the population standard error is .2, what is the 95% confidence interval?  In other words, we would be 95% confident that the true population mean lies between _[lowest]_ and _[highest]_. 

This is USF