Question

An independent-measures research study uses two samples, each with n = 8 participants. If the data produce a t statistic of t = 2.50, then which of the following is the correct decision for a two-tailed hypothesis test? Group of answer choices Reject the null hypothesis with a = .05 but fail to reject with a = .01. cannot answer without additional information Reject the null hypothesis with either a = .05 or a = .01. Fail to reject the null hypothesis with either a = .05 or a = .01.

Answer #1

TOPIC:Testing of hypothesis.

An independent-measures research study uses two samples, a total
of 23 participants in both samples combined. If the data produce a
t statistic of t = 2.10, then which of the following is the correct
decision for a two-tailed hypothesis test?
Cannot answer without additional information
Reject the null hypothesis with a = .05 but fail to reject with
a = .01.
Reject the null hypothesis with either a = .05 or a = .01.
Fail to reject the null...

1. Which of the following sets of data provides the clearest
difference between the two samples?
One sample has M = 20 with s2 = 5 and the other has M = 30 with
s2 = 5.
One sample has M = 20 with s2 = 5 and the other has M = 25 with
s2 = 5.
One sample has M = 20 with s2 = 10 and the other has M = 30 with
s2 = 10.
One...

1.- A researcher obtains t = 2.25 for a
repeated-measures study using a sample of n = 10
participants. Based on this t value, what is the correct
decision for a two-tailed test?
a.
Reject the null hypothesis with α = .05 but not with
α = .01
b.
Reject the null hypothesis with both α = .05 and
α = .01
c.
Fail to reject the null hypothesis with both α = .05
and α = .01
d.
Cannot...

Two samples, each with n = 10, produced an independent sample t
statistic of t = -2.97. Which of the following the correct
decisions for a two-tailed test?
A. Fail to reject H0 with α= .05 but reject
H0 with α= .01.
B. Fail to reject H0 with both, α= .05 and
α= .01.
C. Reject H0 with both, α= .05 and
α= .01.
D. Reject H0 with α= .05 but fail to reject
with α= .01.

1. A one-factor ANOVA for independent samples conducted on 4
experimental groups, with n = 8 participants in each group,
produces the following partial outcomes: SSbetween = 36, SSwithin =
84. For this analysis, what is the computed F statistic?
A. F = 3
B. F = 12
C. F = 8
D. F = 6
E. F = 21
F. F = 4
2. A researcher reports an outcome of one factor ANOVA for
independent samples as F(2, 36)...

1a
The following data were obtained from an independent-measures
research study comparing three treatment conditions.
I
II
III
2
5
7
5
2
3
0
1
6
1
2
4
2
2
T =12
T =10
T =20
G = 42
SS =14
SS =9
SS =10
ΣX2= 182
Use an ANOVA with α = .05 to determine whether there are any
significant mean differences among the treatments.
The null hypothesis in words is
Group of answer choices
a. There...

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 =...

1a)
A researcher conducts an independent-measures study to examine
how the brain chemical serotonin is related to aggression. One
sample of rats serves as a control group and receives a placebo
that does not affect normal levels of serotonin. A second sample of
rats, low serotonin group, receives a drug that lowers brain levels
of serotonin. Then, the researcher tests the animals by recording
the number of aggressive responses each of the rats display. See
the data below. Is there...

The following data were obtained from an independent-measures
research study comparing three treatment conditions.
I
II
III
n = 6
n = 4
n =
4
M = 2
M = 2.5
M = 5
N = 14
T = 12
T = 10
T = 20
G = 42
SS = 14
SS = 9
SS = 10
ΣX2tot = 182
Use an ANOVA with α = .05 to determine whether there are any
significant mean differences among the...

The following data were obtained from an independent-measures
research study comparing three treatment conditions.
I
II
III
n = 6
n = 4
n =
4
M = 2
M = 2.5
M = 5
N = 14
T = 12
T = 10
T = 20
G = 42
SS = 14
SS = 9
SS = 10
ΣX2tot = 182
Use an ANOVA with α = .05 to determine whether there are any
significant mean differences among the...

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