Question 1

*The null hypothesis is rejected when

Accepted Answer

A)  The significance level is high
B)  The confidence level is low
C)  The p value is low
D)  The test statistic is low C

Question 2

A study concluded that musical ability is not associated with analytical ability when in fact there is a relationship .This mistake is called

Accepted Answer

A)  Multiple comparison correction
B)  Statistically significant
C)  Type I error
D)  Type II error D

Question 3

Statistical power is defined as

Accepted Answer

A)  1 plus the probability of type I error
B)  1 plus the probability of type II error
C)  1 minus the probability of a type I error
D)  1 minus the probability of a type II error D

Question 4

A researcher is interested in studying a sample population, and then applying the findings to the population .This is referred to as:

Accepted Answer

A)  Statistical inference
B)  Statistical implying
C)  Statistical coding
D)  Statistical relevance

Question 5

An agency analyst is presenting her findings at a conference, and someone from the audience asks her how well she is able to tell if the null hypothesis of her study is false? The analyst recognizes the ability to recognize that the null is false is referred to as:

Accepted Answer

A)  Statistical length
B)  Statistical dexterity
C)  Statistical agility
D)  Statistical power

Question 6

An agency analyst is working on a project where she uses various computer-intensive procedures for simulating a sampling distribution by repeatedly resampling from the original sample itself .She is performing a procedure known as:

Accepted Answer

A)  Bootstrapping
B)  Convergence
C)  Conjunction
D)  Repetition

Question 7

With resource and time constraints, Professor Martinez wants to sample a portion of a population .In order to determine how big a sample, he computes the __________ to achieve the level of precision desireD.

Accepted Answer

A)  Sample requirement rate
B)  Sample size calculation
C)  Sample scope formula
D)  Sample extent range

Question 8

When the researcher starts with a guess or prior probability about the cause of an event, he/she is using:

Accepted Answer

A)  Chi inference
B)  Bayesian inference
C)  Sequential inference
D)  Natural inference

Question 9

Professor Chen is trying to estimate the true parameter from the sample she is using, in order to make inferences to the population .She wants to be 95% confident of her estimate .Professor Chen is calculating a:

Accepted Answer

A)  Confidence interval
B)  Symmetrical computation
C)  Confidence statement
D)  Functional inquiry

Question 10

A researcher must consider that confidence intervals only reflect some sources of error, and may not capture:

Accepted Answer

A)  Measurement error
B)  Nonresponse error
C)  Causal inference error
D)  All of the above

Question 11

Professor Luigi wants to test whether two categorical variables are related from a cross-tabulation of datA .He is likely to use a:

Accepted Answer

A)  Criterion-subject test
B)  Chi-square test
C)  Alpha-beta test
D)  Mixed course test

Question 12

In his research, Professor Smith collected estimates from several samples of the same size from the same population .In doing so, he is creating part of a:

Accepted Answer

A)  Sampling reference
B)  Sampling cohort
C)  Sampling distribution
D)  Sampling schema

Question 13

As a rule of thumb used by journals and research organizations, the most common significance level is typically __.

Accepted Answer

A)  .05
B)  .50
C)  .25
D)  .75

Exam 9: Making Sense of Inferential Statistics