Statistics
Mean= 14.8 Median= 15 Mode= 16
Find and discuss the mean, median, and mode : College credits being taken by a sample of 13 full time students for a semester. 12, 14, 16, 15, 13, 14, 15, 18, 16, 16, 12, 16, 15
a) 17.8 b) 39.8
The depths at which 10 artifacts are found are: 20.7, 24.8, 30.5, 26.2, 36.0, 34.3, 30.3, 29.5, 27.0, 38.5 a) Find the range of the data set b) Chnge 38.5 to 60.5 and find the rage of the new data set
Range: 70 Mean: 186.1 Variance: 340 Standard Variation: 18.4
The weights of all U.S. presidents since 1952 are listed below. Find the range, mean, variance, and standard deviation of the population data set. 173, 175, 200, 173, 160, 185, 195, 230, 190, 180
Lower Class Limits: 10, 25, 40, 55, 70, 85 Upper Class Limits: 24, 39, 54, 69, 84, 99
Use the given minimum and maximum data entries, and the number of classes, to find the class width, the lower class limits, and the upper class limits. Minimum = 10, Maximum=95, 6 classes.
Organizing the data into a frequency distribution can make patterns within the data more evident
What are some benefits of representing data sets using frequency distributions?
It can be easier to identify patterns of a data set by looking at a graph of the frequency distribution
What are some benefits of using graphs of frequency distributions?
A frequency polygon displays class frequencies while an ogive displays cumulative frequencies
What is the difference between a frequency polygon and an ogive?
Class limits are the least and greatest numbers that can belong to the class. Class boundaries are the numbers that separate classes without forming gaps b/w them. For integer data, the corresponding class limits and class boundaries differ by 0.5
What is the difference between class limits and class boundaries
Relative frequency of a class is the percentage of the data that falls in that class, while cumulative frequency of a class is the sum of the frequencies of that class and all previous classes.
What is the difference between relative frequency and cumulative frequency?
