




Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
Verified solutions to questions related to statistics, including frequency distribution, relative frequency, column and bar charts, pie charts, histogram, crosstabulation table, interquartile range, variance, standard deviation, z-score, left-skewed data, bell-shaped curve, empirical rule, covariance, and correlation coefficient. It also explains the purpose of a frequency distribution table and the steps to summarize quantitative data. useful for students studying statistics or related fields.
Typology: Exams
1 / 8
This page cannot be seen from the preview
Don't miss anything!
frequency distribution - correct answers ✅A tabular summary chart of data, showing how frequently each of the various observations occurs in each category or class relative frequency - correct answers ✅A ratio that compares the frequency of each category to the total number of categories (multiply by 100 to get relative frequency percentage) What is the purpose of a frequency distribution table? - correct answers ✅To help us understand the data numerically by showing the frequency distribution and relative percentage What is the difference between a column chart and a bar chart? - correct answers ✅In a column chart, the rectangular shapes representing each category are displayed vertically and lined up on the x-axis of the chart. The y-axis represents the frequency. The bar chart is the same as the column chart except the axis are transposed.
How does a pie chart visualize data? - correct answers ✅The wedges are easily seen to represent the individual classes of data with their respective proportions while the whole pie represents the total (n). What are the 3 steps to summarize quantitative data in a frequency distribution table? - correct answers ✅1) Determine the # of classes to be evaluated (consider the # of items in the data set & the range of the data)
The __________ will be the only measure of central tendency for qualitative data. - correct answers ✅mode Data sets with two modes are called ________. Sets with more than two modes are called ________. - correct answers ✅bimodal / multimodal How do we find the mode of a data set? - correct answers ✅Set up a a frequency distribution table for the data with each value in the set. How do we find the mean of a data set? - correct answers ✅Sum of all values divided by the number of values recorded. How many quartiles can a data set be broken up into and what are they? - correct answers ✅3 - Q1, Q2 (equal to the median), Q What is the range of a data set? - correct answers ✅The range of a set of data is the difference between the highest and lowest values in the set.
Why is the range of a data set seldom used as the only measure of variability? - correct answers ✅it's only based on two observations and can be influenced by extreme values What is the interquartile range? - correct answers ✅The difference between the upper/third quartile and the lower/first quartile. Called "IQR" : 1QR = Q
bell shaped curve - correct answers ✅Symmetrical curve of normal distribution. Mean = median. Equal # of data values occurring on both sides of center Empirical Rule - correct answers ✅The rules given to interpret the standard deviation of a data set when it follows normal distribution/bell-shaped curve.