BEH383 Study Final Guide Exam With
Complete Solutions
Preparing Data for Analysis Review - ANSWER
A demand characteristic is - ANSWER When a person responds in an experiment
in a way that is consistent with their beliefs about how the experimenter would
like them to behave.
If a test is valid, what does this mean - ANSWER The test measures what it
claims to measure.
A predictor variable is another name for - ANSWER An independent variable
A frequency distribution in which high scores are most frequent (i.e. bars on the
graph are highest on the right hand side) is said to be - ANSWER Negatively
skewed
A large standard deviation (relative to the value of the mean itself) - ANSWER
indicates that the data points are distant from the mean (i.e. the mean is a poor
fit of the data).
In IBM SPSS, what does clicking on this icon do? (arrows pointing to 1 to an "a -
ANSWER Display or hide the value labels of coding variables.
In IBM SPSS, what does clicking on this icon do? (paper and arrow) - ANSWER
Enable you to add a title to the SPSS output.
In SPSS, where in the "Analyze" menu can you find t-tests - ANSWER "Compare
Means"
In SPSS, where in the "Analyze" menu can you find one-way ANOVA - ANSWER
"Compare Means"
In SPSS, where in the "Analyze" menu can you find factor analysis - ANSWER
"Dimension Reduction"
Central Tendency & Dispersion - ANSWER
Imagine we took a group of smokers, recorded how many cigarettes they
smoked each day and then split them randomly into one of two 6-week
, interventions; 'hypnosis' or 'nicotine patch'. After the 6 weeks, we again
recorded how many cigarettes they smoked each day and subtracted this
number from the number of cigarettes they each smoked pre-intervention, to
produce a intervention success score for each participant. Out of the following
options, which would be the best method of displaying the results? - ANSWER A
simple boxplot with the variable 'intervention method' on the x-axis and
'intervention success' on the y-axis.
The Kolmogorov-Smirnov test can be used to test - ANSWER Whether scores are
normally distributed.
The assumption of homogeneity of variance is met when - ANSWER The
variances in different groups are approximately equal.
A _____ is a numerical characteristic of a sample and a _____ is a numerical
characteristic of a population - ANSWER statistic, parameter
A kurtosis value of -2.89 indicates - ANSWER A flat and light-tailed distribution.
Levene's test can be used to measure - ANSWER Whether group variances
differ.
Normality & Outliers - ANSWER
If my experimental hypothesis were 'Eating cheese before bed affects the
number of nightmares you have', what would the null hypothesis be - ANSWER
The number of nightmares you have is not affected by eating cheese before bed.
Comparing Two Means (t-Tests) - ANSWER
If my null hypothesis is 'Dutch people do not differ from English people in height',
what is my alternative hypothesis - ANSWER All of the statements are plausible
alternative hypotheses.
A researcher in a Human Resources Unit presented a recent study, which
showed a statistical significance between length of staff lunch breaks and low
productivity; how can she explain to her manager that this does not mean that
the length of staff lunch breaks should be reduced - ANSWER A significant result
does not mean that the effect is important.
A trainee data analyst for a large social media company, which has falling site
usage, has just completed a study into factors that affect site users' satisfaction
levels. However, he finds only one statistically significant factor, which he
includes in his report but he deliberately, omits the other six non-significant
findings. What is the term for what the data analyst has done - ANSWER p-
hacking
Complete Solutions
Preparing Data for Analysis Review - ANSWER
A demand characteristic is - ANSWER When a person responds in an experiment
in a way that is consistent with their beliefs about how the experimenter would
like them to behave.
If a test is valid, what does this mean - ANSWER The test measures what it
claims to measure.
A predictor variable is another name for - ANSWER An independent variable
A frequency distribution in which high scores are most frequent (i.e. bars on the
graph are highest on the right hand side) is said to be - ANSWER Negatively
skewed
A large standard deviation (relative to the value of the mean itself) - ANSWER
indicates that the data points are distant from the mean (i.e. the mean is a poor
fit of the data).
In IBM SPSS, what does clicking on this icon do? (arrows pointing to 1 to an "a -
ANSWER Display or hide the value labels of coding variables.
In IBM SPSS, what does clicking on this icon do? (paper and arrow) - ANSWER
Enable you to add a title to the SPSS output.
In SPSS, where in the "Analyze" menu can you find t-tests - ANSWER "Compare
Means"
In SPSS, where in the "Analyze" menu can you find one-way ANOVA - ANSWER
"Compare Means"
In SPSS, where in the "Analyze" menu can you find factor analysis - ANSWER
"Dimension Reduction"
Central Tendency & Dispersion - ANSWER
Imagine we took a group of smokers, recorded how many cigarettes they
smoked each day and then split them randomly into one of two 6-week
, interventions; 'hypnosis' or 'nicotine patch'. After the 6 weeks, we again
recorded how many cigarettes they smoked each day and subtracted this
number from the number of cigarettes they each smoked pre-intervention, to
produce a intervention success score for each participant. Out of the following
options, which would be the best method of displaying the results? - ANSWER A
simple boxplot with the variable 'intervention method' on the x-axis and
'intervention success' on the y-axis.
The Kolmogorov-Smirnov test can be used to test - ANSWER Whether scores are
normally distributed.
The assumption of homogeneity of variance is met when - ANSWER The
variances in different groups are approximately equal.
A _____ is a numerical characteristic of a sample and a _____ is a numerical
characteristic of a population - ANSWER statistic, parameter
A kurtosis value of -2.89 indicates - ANSWER A flat and light-tailed distribution.
Levene's test can be used to measure - ANSWER Whether group variances
differ.
Normality & Outliers - ANSWER
If my experimental hypothesis were 'Eating cheese before bed affects the
number of nightmares you have', what would the null hypothesis be - ANSWER
The number of nightmares you have is not affected by eating cheese before bed.
Comparing Two Means (t-Tests) - ANSWER
If my null hypothesis is 'Dutch people do not differ from English people in height',
what is my alternative hypothesis - ANSWER All of the statements are plausible
alternative hypotheses.
A researcher in a Human Resources Unit presented a recent study, which
showed a statistical significance between length of staff lunch breaks and low
productivity; how can she explain to her manager that this does not mean that
the length of staff lunch breaks should be reduced - ANSWER A significant result
does not mean that the effect is important.
A trainee data analyst for a large social media company, which has falling site
usage, has just completed a study into factors that affect site users' satisfaction
levels. However, he finds only one statistically significant factor, which he
includes in his report but he deliberately, omits the other six non-significant
findings. What is the term for what the data analyst has done - ANSWER p-
hacking
