Define descriptive and inferential statistics. How are they different? How does
ID: 3069053 • Letter: D
Question
Define descriptive and inferential statistics. How are they different?
How does the sample relate to the population?
List and describe the three types of central tendency.
When would it be better to use the median, rather than the mean?
Compute the mean, median and mode of the Yourtown Basketball team if the team members’ heights are as follows: 75”, 72”, 70”, 78”, 67”, 73”, 74”, 74”, 71”. Show your work.
Joe Pupil is a sophomore in Statistics 101. What is his final grade for the semester?
Assignment
Grade
Midterm
80
Final
93
Presentation
75
Homework #1
83
Homework #2
61
Homework #3
85
Homework #4
90
Which would be more appropriate (mean or median) to use for the following test scores:
23, 84,86,89,89,91,94
Why?
Using the procedure explained on page 385 of your text to find the mean median and mode of reac tm from chapter3 data set1 using SPSS.
Explanation / Answer
Define descriptive and inferential statistics. How are they different?
descriptive statistics involves collecting,summarizing and describing data comes
Examples of descriptive statistics/;
average rainfall in US last year.
Number of car thefts
percentage of males
Inferenial statistics involves
Drawing conclusions and or making decisions concerning a population based only on sample data.
Examples of Inferential statistics:
By 2040 atleast 3.5 billion people will run short of water.
How does the sample relate to the population?
the population is the entire group being studied.
a sample is part of the population being surveyed.
Compute the mean, median and mode of the Yourtown Basketball team if the team members’ heights are as follows: 75”, 72”, 70”, 78”, 67”, 73”, 74”, 74”, 71”. Show your work.
mean=sum of team mebers heights /total members
=654/9
=72.66667
medianis middle most value when data arranged in ascending order
67 70 71 72 73 74 74 75 78
median=73
mode is most repeating item
74 repeats 2 times
mode=74
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