Frequency Distributions

Question Answer
What is a raw score A data point that has not been transformed or analyzed
What is a frequency distribution the pattern of a set of numbers by displaying a count or proportion for each possible variable
What is a frequency table a visual depiction of data that shows how often each value occurred that is how many scores were at each value.Values are listed in one column and scores are listed in second column
What is a histogram It looks like a bar graph but is typically used to depict scale data with the x-axis and the frequencies on the y-axis
What is a frequency polygon is a line graph with the x-axis representing values or midpoints of intervals and the y-axis representing frequencies. A dot is placed at the frequency and connected
What is a grouped frequency table a visual depiction of data that reports the frequencies within a given interval rather than the frequencies for a specific value
What is a normal distribution a specific frequency distribution that is a bell shaped symmetric uni-modal curve
What does positively skewed mean the distribution tail extends to the right in a positive direction
What is the floor effect a situation in which a constraint prevents a variable from taking on values below a certain point
What is the ceiling effect a situation in which a constraint prevents a variable from taking on values above a given number