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Work the following problems
PSY 205: Research Methods I
Module 5: Assignment
Work the following problems.
1. For each of the following data sets find the following.
(You can use the Data Analysis Toolpak (Descriptive Statistics) for most of the calculations, but you’ll need VAR and STDEV functions to calculate the unbiased estimates.)
Mean
Median
Mode
Range
Variance (for describing the data)
Standard deviation (for describing the data)
The unbiased estimate of the variance
The unbiased estimate of the standard deviation
Data Set AData Set BData Set C
Scores on a Math TestScores on English TestScores on a Test of
Spatial Ability
7888100
5590124
736784
887788
9071104
9280108
736878
807784
677784
7692110
2. Describe the normal curve.
3.Compute the z scores for the following raw scores where X = 74 and the standard deviation = 8.
A.66
B.86
4.Using a distribution with a mean of 100 and a standard deviation of 15.
A.What is the percentile score of a score of 112?
B.What is the percentile score of a score of 82?
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