BESC 3010 Exam 1 with Correct Answers New update
What does the label Q2 refer to? - Answer-The median score or the 50th percentile
What are the values of skew ness and kurtosis for a normal distribution? - Answer-S=0 K = 0
What is the degrees of freedom for the sample variance? - Answer-N...
What does the label Q2 refer to? - Answer-The median score or the 50th percentile
What are the values of skew ness and kurtosis for a normal distribution? - Answer-S=0
K=0
What is the degrees of freedom for the sample variance? - Answer-N-1
Compared to a mesokurtic distribution, the peak of a leptokurtic distribution is... -
Answer-Narrower and higher
What is the relationship between the standard deviation and the variance? - Answer-
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? - Answer-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.... - Answer-Positively
skewed
What percent of a normal distribution is below a z score of +1? - Answer-84%
The standard normal distribution... - Answer-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? - Answer-70
For a distribution with m=100 and sd= 15, what is the raw score of 112 - Answer-+0.8
In a positively skewed distribution which level of central tendency has the highest
value? - Answer-The mean
In a Uniondale distribution with a mean of 80 and a standard deviation of 20 what would
the z score be for a raw score of 80? - Answer-0
In a bimodal distribution with a mean of 80 and a standard deviation of 20 what would
be the z score for a raw score of 80? - Answer-0
, When a distribution of raw scores is converted to z scores the shape of the
distributions.... - Answer-Remains the same
When a distribution of raw scores is converted to z scores the mean and standard
deviation of the distribution will be... - Answer-M=0 and sd=1
If a person has a z score of 1 on the test then their score is... - Answer-One standard
deviation above the mean
If a distribution has a mean of 50 and a standard deviation of 5 then the raw score of 68
would have a z score of... - Answer-3.6
Categorical variable - Answer-Indicates different categories. Ex: gender, college major
etc.
Nominal variable - Answer-The variable consists of names of categories. The coding
system is arbitrary.
Ordinal variables - Answer-Indicates first, second, third, etc. rank variables.
Quantitative variables - Answer-You can measure the size of the differences between
scores and not just that they are different. Divided into interval and ratio.
Interval variable - Answer-They indicate the size of the difference between scores but
they don't have a zero starting point. ( IQ or temperature)
Ratio variable - Answer-Have definite zeros that indicate the complete absence of
something.
In a sample of women, the # of children that each woman has is an example of which
levels of measurement? - Answer-Ratio
Military ranks are an example of what level of measurement? - Answer-Ordinal
Gender is an example of what level of measurement? - Answer-Nominal
A sample is part of a larger... - Answer-Population
A bivariate analysis typically focuses on... - Answer-The association of two variables
Inferential statistics are typically contrasted with what statistics? - Answer-Descriptive
Which is a defining characteristic of experiments? - Answer-Manipulations
The respondents gender is typically recorded a what kind of variable? - Answer-Nominal
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