Exam (elaborations)
biostats midterm exam Questions and answers
- Course
- Institution
biostats midterm exam Questions and answers
[Show more]
Content preview
biostats midterm exam Questionsand answers
A researcher uses a six-sided dice to determine group membership. The
sampling method being used is:
a. random sample.
b. stratified sample.
c. convenience sample.
d. clustered sample. - - a. random sample
- The level of measurement has an absolute 0 as a meaningful value is:
a. nominal
b. ordinal
c. interval
d. ratio - - ratio
- A critical aspect of linear transformation of data is that it:
a. can change a curvilinear relationship between two variables into a linear
relationship.
b. may change the mean and standard deviation of a variable but not change
the shape of the distribution
c. can make a non-normal distribution more normalized.
d. can change the percentile rank of the individual scores. - - may change
the mean and standard deviation of a variable but not change the shape of
the distribution
- The level of measurement for a 10-point pain scale where 1 is no pain and
10 is very painful is:
a. nominal
b. ordinal
c. interval
d. ratio - - interval
- Likert-scaled instruments could be considered all BUT what level of
measurement:
a.nominal
b.ordinal
c.interval
d.ratio - - nominal
- The Gaussian distribution is also known as the ____________ distribution:
a. normal
b. exponential
c. positively-skewed
,d. platykurtic - - normal
- Approximately two-thirds of all values in the standard normal distribution
fall within how many standard deviations of the mean:
a.0
b.1
c.2
d.3 - - 1
- This element is not typically included in a behavioral experiment:
a. a treatment or intervention
b. assessment of an outcome.
c. random assignment
d. uncontrolled variables - - uncontrolled variables
- The degree to which a study's results can be replicated in real world
settings is:
a. rival explanation
b. temporal precedence
c. external validity
d. internal validity - - external validity
- What type of analysis should be used for a between-S design with more
than two levels for the independent variable group:
a. repeated measures analysis of variance
b.one-way analysis of variance
c. independent samples t-test
d. Friedman analysis of variance - - one-way analysis of variance
- A researcher has a categorical independent variable and a quantitative
dependent variable. Which of the following analyses would not be
appropriate:
a. paired-samples t-test
b. one-way between S analysis of variance
c. chi-square test of association
d. Wilcoxon signed-rank test - - chi square
- Which analysis would be appropriate when comparing subjects scores on a
pretest and a posttest:
a. independent samples t test
b. one-way between S analysis of variance
c. paired-samples t test
d. Wilcoxon rank sum test - - paired samples t test
- Assigning individuals to groups based on the study variable of interest is:
a. matching
, b. random assignment
c. random selection
d. repeated measures - - matching
- The degree to which a study supports a causal relationship is:
a. criterion validity
b. construct validity
c. internal validity
d. external validity - - internal validity
- If an extraneous variable is associated with the independent variable and
affects the outcome of the dependent variable, it is considered a:
a. temporal precedence
b. nuisance variable
c. outcome variable
d. confounded variable - - confounded variable
- Which type of analysis would you use a chi-square test of association:
a. both X and Y are categorical variables.
b. X is categorical and Y is quantitative.
c. X is quantitative and Y is categorical.
d. both X and Y are quantitative variables. - - both X and Y are categorical
variables
- True or False:
All members of a population of interest should be identifiable. - - true
- True or False:
A researcher surveys freshman college students at her school about
beverages available in the dining hall. After analyzing her results,. she
states, "Twenty percent of college students nationwide prefer non-
carbonated beverages." Is the researcher's conclusion accurate? - - false
- True or False:
Variables with interval- or ratio-level measurements are considered
quantitative variables. - - true
- True or False:
Means and standard deviations can be calculated with Likert-scaled
measurement. - - True
- True or False:
Parametric statistics include the Wilcoxon rank-sum test, the sign test, and
the Friedman one-way analysis of variance. - - False
- True of False :
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Nursephil2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79223 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now