PYC 3704 PSYCHOLOGICAL RESEARCH EXAM QUESTIONS
WITH WELL DETAILED ANSWERS
A bowl contains 6 red, 5 green, 8 blue and 3 yellow marbles. If a single marble is chosen at
random from
the jar, what is the probability that the marble would be EITHER green OR yellow? - ✔✔ 0.363
The number of items that fall into each of an ordered list of categories is calculated, based on a
sample of
data. Each of these counts are divided by the total number of observations to produce a list of
values.
This list of values gives an estimate of the - - - - - distribution of the observations. - ✔✔
probability
The standard error is a measurement of - - - - -. - ✔✔ 1. how well a sample mean approximates a
population mean
An educational psychologist measures the general knowledge of 100 learners on a questionnaire
with
50 questions. She finds the means and standard deviations of the scores are 20 and 8 respectively
for
the sample of data.
What is the z-score corresponding to a test score of 14 on the general knowledge test? - ✔✔ -
0.75
, An educational psychologist measures the general knowledge of 100 learners on a questionnaire
with
50 questions. She finds the means and standard deviations of the scores are 20 and 8 respectively
for
the sample of data.
What is the probability that a specific learner will obtain a score of 14 or less on the
questionnaire in the
scenario above? - ✔✔ 0.2266
When applying a statistical test, a decision is reached by comparing the - - - - - to the - - - - -. -
✔✔ p-value; level of significance
What does it mean to say "the difference between the means of groups A and B is statistically
significant"? - ✔✔ The sample result is more probable under the alternative hypothesis.
The value that is conventionally indicated with the symbol α refers to the - - - - -. - ✔✔
maximum probability of making an error of Type I if the rejection of H0 is to be considered
A null hypothesis is - - - - -. - ✔✔ the assumption that there is no relationship or difference
between parameters of the variables you
are testing
If you decided to set the level of significance to α = 0.001 rather than a more conventional level
of α = 0.05,
WITH WELL DETAILED ANSWERS
A bowl contains 6 red, 5 green, 8 blue and 3 yellow marbles. If a single marble is chosen at
random from
the jar, what is the probability that the marble would be EITHER green OR yellow? - ✔✔ 0.363
The number of items that fall into each of an ordered list of categories is calculated, based on a
sample of
data. Each of these counts are divided by the total number of observations to produce a list of
values.
This list of values gives an estimate of the - - - - - distribution of the observations. - ✔✔
probability
The standard error is a measurement of - - - - -. - ✔✔ 1. how well a sample mean approximates a
population mean
An educational psychologist measures the general knowledge of 100 learners on a questionnaire
with
50 questions. She finds the means and standard deviations of the scores are 20 and 8 respectively
for
the sample of data.
What is the z-score corresponding to a test score of 14 on the general knowledge test? - ✔✔ -
0.75
, An educational psychologist measures the general knowledge of 100 learners on a questionnaire
with
50 questions. She finds the means and standard deviations of the scores are 20 and 8 respectively
for
the sample of data.
What is the probability that a specific learner will obtain a score of 14 or less on the
questionnaire in the
scenario above? - ✔✔ 0.2266
When applying a statistical test, a decision is reached by comparing the - - - - - to the - - - - -. -
✔✔ p-value; level of significance
What does it mean to say "the difference between the means of groups A and B is statistically
significant"? - ✔✔ The sample result is more probable under the alternative hypothesis.
The value that is conventionally indicated with the symbol α refers to the - - - - -. - ✔✔
maximum probability of making an error of Type I if the rejection of H0 is to be considered
A null hypothesis is - - - - -. - ✔✔ the assumption that there is no relationship or difference
between parameters of the variables you
are testing
If you decided to set the level of significance to α = 0.001 rather than a more conventional level
of α = 0.05,
