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BESC 3010 Exam 1 with Complete Solutions
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BESC 3010 Exam 1 with Complete Solutions
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BESC 3010 Exam 1 with CompleteSolutions
Which measure of variation is most influenced by outliers? Correct Ans-Range
Compared to a mesokurtic distribution, the peak of the platykurtic distribution is... Correct
Ans-Not as high
For a normal distribution, skewness is equal to... Correct Ans-Zero
If the formula for the population standard deviation were used with sample data, the result
would be... Correct Ans-Too small
One good use for range is to Correct Ans-Check for outliers
Compared to mesokurtic, the tails of a leptokurtic distribution ... Correct Ans-Are longer
If scores in a data set are very different from each other then the standard deviation...
Correct Ans-Will be high
Which measure of variation is least sensitive to outliers? Correct Ans-IQR
For a normal distribution kurtosis is... Correct Ans-0
When scores in a data set are very close to one another, then the variance ... Correct Ans-
Will be close to zero
, What does the label Q2 refer to? Correct Ans-The median score or the 50th percentile
What are the values of skew ness and kurtosis for a normal distribution? Correct Ans-S=0 K =
0
What is the degrees of freedom for the sample variance? Correct Ans-N-1
Compared to a mesokurtic distribution, the peak of a leptokurtic distribution is... Correct
Ans-Narrower and higher
What is the relationship between the standard deviation and the variance? Correct Ans-The
standard deviation is the square root of the variance
For a distribution of m=80 and sd=6 what is the x score for a person who has a z score of -1.5?
Correct Ans-71
If a positively skewed distribution with a mean of 100 and a standard deviation of 15 is
standardized, then the shape of the new distribution will be.... Correct Ans-Positively skewed
What percent of a normal distribution is below a z score of +1? Correct Ans-84%
The standard normal distribution... Correct Ans-Is a bell curve with m=0 and sd=1
If a person gets a z score of -2 on a test that had a mean of 80 and a standard deviation of 5
then what was their raw score? Correct Ans-70
For a distribution with m=100 and sd= 15, what is the raw score of 112 Correct Ans-+0.8
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