Quiz Over 1ST HALF
of Chapter 7 (pp. 145160)
Hypothesis Testing
NOTE: Whenever used, the abbreviated "HT" stands
for the phrase, "hypothesis testing"
Introduction
 (T/F) Hypothesis testing (HT) involves a form of logic that seems,
at first glance, "topsyturvy."
 How many steps are there in the simplest, most "barebones" version
of HT?
 The 4 "preliminary questions" that must be dealt with by a researcher
engaged in HT ____ (are/are not) common to all forms of inferential
statistics.
An Ordered List of the Six Steps
 (T/F) In HT, the sample data are collected & analyzed before
the null hypothesis is stated.
 (T/F) In HT, the level of significance is selected after
the sample data are collected & analyzed.
Step #1: The Null Hypothesis
 What's false here: The null hypothesis is vague, deals with a sample
statistic, and comes from a formula.
 What symbol denotes the null hypothesis?
 (Yes/No) Must the "statistical focus" selected by the researcher
be reflected in the null hypothesis?
 Which of these is not a legitimate null hypothesis:
 Ho: m = 0
 Ho: m > 0
 Ho: m = 10
 What's the minimum number of populations that can be involved in
a study wherein HT is used?
 (T/F) In studies involving 2 populations, the Ho must
be set up to be a "no difference" statement.
 Why are these 2 null hypotheses equivalent in meaning?
 Ho: m1 =
m2
 Ho: sm2
= 0
 If a null hypothesis about group means is expressed in symbols (starting
with Ho), which of the following will NOT be
revealed?
 The fact that the focus is on populations.
 The fact that the focus is on means.
 The number of groups.
 The nature of the dependent variable.
 (T/F) The null hypothesis usually corresponds with the researcher's
hunch about the way things really are.
Step #6: The Decision Regarding the Null Hypothesis
 In Step 6, a researcher will make a decision about Ho;
he/she will either _____ Ho or _____ Ho.
 In each of these cases, what is the researcher's likely decision
about Ho if he/she indicates that
 p < .01
 Ho is tenable
 p > .05
 ns
 reliable differences exist
Step #2: The Alternative Hypothesis
 Whereas the null hypothesis is symbolized as Ho, the alternative
hypothesis is symbolized as __ or __ .
 (Yes/No) Will the alternative hypothesis ever be set up to
say the same thing as the null hypothesis?
 In a correlational study, what would a nondirectional Ha
look like if the null hypothesis says: Ho: r
= 0
 (T/F) Researchers typically set up their alternative hypotheses
to be directional (not nondirectional).
 (T/F) Ha, if set up to be nondirectional, could
legitimately be referred to as being "twosided."
 If Ha is set up to be directional, this means that the
inferential test being conducted is ___ (1/2)tailed.
 What would Ha look like if the researcher is conducting
a twotailed test of Ho: m = 50?
 What would Ho look like, if set up to be "inexact," if
it's paired with Ha: m > 100?
Step #4: Collection and Analysis of Sample Data
 If the sample statistic and the hypothesized population parameter
are very similar, the null hypothesis _____ (will/won't) be rejected.
 If the sample statistic and the hypothesized population parameter
are quite dissimilar, the null hypothesis _____ (will/won't)
be rejected.
 The numerical value that summarizes the sample data (in Step 4) is
called the _____ or the ______ .
 (T/F) When HT is focused on Pearson's correlation, the calculated
value usually is the sample value, r.
 (T/F) A study's statistical focus normally does not
show up in the calculated value computed in Step #4.
 A small pvalue indicates that the sample data deviate ___
(a little/a lot) from what would be expected if the null hypothesis
was true . . . and thus the null hypothesis ____ (should/shouldn't)
be rejected.
 (T/F) In Excerpt 7.18, the null hypothesis might have been rejected
if the mean for the children who listened to the musical story had
been 15.50 (and if everything else about the studyexcept the
calculated valueremained the same.)
Click here for answers.
NOTE: Questions dealing
with the 2nd half of Chapter 7 appear in a separate quiz.
