Question

research hypothesis stating the treatment effect in contrast to the statement of null effect

alternative hypothesis |
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central limit theorem |
||

sampling bias |
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two-tailed test |

upper probability value allowed for rejecting the null hypothesis

significance level |
||

parameter |
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type 1 error |
||

two-tailed test |

drawing conclusions about a population from sample data

empirical data |
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inferential statistics |
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discrete distribution |
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random sampling |

Assume that a new treatment for helping alcoholics isn't any better than an old treatment. A researcher, who doesn't know this, designs a study to compare the effectiveness of the two treatments. Based on the results of the study the researcher rejects the Null Hypothesis. What outcome has occurred?

scientific validation |
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type I error |
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type II error |
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correct rejection |

Which of the following is true if a statistical test is
significant at the 0.01 level ( *p*<0.01)?

it is not significant at .05 level |
||

it is also significant at .05 level |
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a type 2 error has occurred |
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it is also significant at the .001 level |

Answer #1

TOPIC:Questions on testing of hypothesis.

___ non-directional test
___ directional test
___ alpha
level
___ null hypothesis
___ alternative
hypothesis e.
___ rejection range
___
inferential
___
inference
___ significance tests
___ statistical power
a. The hypothesis that is rejected or retained using inferential
statistics and is often the opposite of what the researcher
believes to be true.
b. The researcher hypothesizes that a given score will be either
higher or lower than the chosen level of significance.
c. The likelihood of rejecting the null hypothesis...

A two-tailed hypothesis test is being used to evaluate a
treatment effect with α = .05. If the sample data produce a z-score
statistic of z = -1.24, then what is the correct decision?
Reject the null hypothesis and conclude that the treatment has
no effect.
Reject the null hypothesis and conclude that the treatment has
an effect.
Fail to reject the null hypothesis and conclude that the
treatment has an effect.
Fail to reject the null hypothesis and conclude...

Question #3
A researcher is conducting and experiment to evaluate a
treatment that is expected to increase the scores for individuals
in a population. If the researcher uses a one-tailed test with ( a
= .01), then which of the following correctly identifies the
critical region?
A. z > 2.33
B. z > 2.58
C. z < 2.33
D. z < 2.58
Question #4
A researcher evaluates a treatment effect using a two tailed
hypothesis test with ( a =...

a researcher conducts a hypothesis test to evaluate the effect
of the treatment. the hypothesis test produces a z-score of z=
2.75. Assuming that the researcher is using a two-tailed test,what
decision should be made?

A researcher conducted a single-sample null hypothesis test with
the z-statistic. The researcher reports that z = +1.30. This
z-statistic was calculated from sample data that was drawn from a
normal population. The researcher sets α = .05 and uses a
two-tailed test. On the basis of his data, the researcher decides
to fail to reject the null hypothesis. Did the researcher make the
correct decision or did he make an error? If he made an error, what
type of...

For your answers pick one
*A researcher was interested in inspecting the effect of
classical music on stress among New York students. She studied a
sample of 30 New York students. She found that z= -3.00. Using a =
0.5(two-tailed), what can she conclude?
-Reject the null hypothesis and conclude that classical music
has no effect on stress levels
-Reject the null hypothesis and conclude that classical music has
no effect on stress levels
-Failed to reject the null hypothesis...

1.) Choose the true statement.
a.) If a null hypothesis is rejected for a test statistic at the
α=0.05 level, then at the α=0.01 level it would
never reject.
b.) If a null hypothesis is rejected for a test statistic at the
α=0.05 level, then at the α=0.01 level it would
always reject.
c.) If a null hypothesis is rejected for a test statistic at the
α=0.05 level, then at the α=0.01 level it may or
may not reject.
2.)...

1. After summarizing data collected to test a null hypothesis
(e.g., observing z as a test statistic), a researcher fails to
reject the null hypothesis (p > .05). The researcher then
concludes that there is no treatment effect (treatment does not
affect variation on the DV).
Is this a correct conclusion?
a. yes, it is correct
b. no, it is incorrect; a decision to fail to reject the null
hypothesis results in ignorance about a treatment effect
35. Consider z...

_____11) If the null hypothesis is that the population mean is
equal to 150 and a sample
mean of 113 gave significant support against the
null hypothesis, which of the
following sample means would be certain to give
support against the null
hypothesis.
a)
114
b.)
122
c.)
264
d.)
112
_____12) If the p-value is less than the significance level, you
would .
a.) reject
the null hypothesis
b.) accept...

The null hypothesis states there will be no difference in scores
on the ADS between those who receive the standard treatment program
and those who receive the standard treatment program plus
Mindfulness Therapy.
The output from the analysis is below. The results are
t(19) = 1.554, p = .137.
Paired Sample Statistics
Mean
N
Std Deviation
Std. Error Mean
Pair 1 Standard
Std. Mindfulness
12.8000
10.9500
20
20
3.81962
4.28553
.85409
.95827
Paired Samples Correlations
N
Correlations
Sig
Pair 1...

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