Blog

An experiment tested whether the context of the learning environment was important in memory recall.  Sixteen people learned a list of 40 unrelated words either inside a room or outside of a house on a patio.  Later they were asked to recall the words in either the same environment they learned the list of words in or the alternative environment. The number of correctly recalled words was measured. What level of measurement is the variable, learning environment?

Based on the box-plot depicted in the picture, which statement is true?

Variables that can assume only a finite number of values or that have a finite number of values that can occur between any two points are called _____ variables.

Given the scores 50, 50, 60, 70, 80, 90, 92, 92, what is the cumulative relative frequency for a score of 90?

In a grouped frequency distribution, the interval size refers to

Sally’s dog just received second place in obedience class. This is considered a ________scale of measurement.

A relative frequency is:

A table that lists scores on a variable and shows the number of occurrences of each score is called a _______ distribution.

Dr. Johnson hypothesizes that NutraSweet reduces short-term memory. In order to test her hypothesis she gives 10 subjects a beverage containing NutraSweet (treatment group) and 10 subjects a beverage without NutraSweet (control group). She then measures the subject’s ability to recall a list of numbers. What is the independent variable?

Round the following value to four decimal places: 3.45599