State whether each of the following related samples
t-tests is significant for a two-tailed test at...
State whether each of the following related samples
t-tests is significant for a two-tailed test at a 0.05
level of significance.
(a)
t(30) = 3.330
Yes, the test is significant.
No, the test is not
significant.
(b)
t(15) = 2.541
Yes, the test is significant.
No, the test is not
significant.
(c)
t(14) = 2.032
Yes, the test is significant.
No, the test is not
significant.
(d)
t(60) = 1.951
Yes, the test is significant.
No, the test is not...
What is the cut-off t-score for each of the following t-tests?
Round your answers to two...
What is the cut-off t-score for each of the following t-tests?
Round your answers to two decimal places.
A two-tailed t-test at the 5% significance level, df = 45
A one-tailed t-test (high predicted) at the 1% significance
level, df = 20
A two-tailed t-test at the 1% significance level, df = 90
State the total degrees of freedom for the following
t-tests. (If you need to use ∞,...
State the total degrees of freedom for the following
t-tests. (If you need to use ∞, enter INFINITY.)
(a)n = 21
for a one-independent sample t-test
(b)df1 = 12,
n2 = 25
for a two-independent sample t-test
(c) critical value = 1.645 for a one-tailed test,
α = 0.05
(d) critical value = 63.657 for a two-tailed test,
α = 0.01
For each of the following samples that were given an
experimental treatment, test whether the samples...
For each of the following samples that were given an
experimental treatment, test whether the samples represent
populations that are different from the general population: (a) a
sample of 11 with a mean of 46, (b) a sample of 1 with a mean of
53. The general population of individuals has a mean of 43, a
standard deviation of 7, and follows a normal curve. For each
sample, carry out a Z test using the five steps of hypothesis
testing...
When we compute an independent-samples t-test, we are
looking to see if there are significant differences...
When we compute an independent-samples t-test, we are
looking to see if there are significant differences between the
means of two independent groups, each measured on a different level
of the independent variable.
True or False
When we compute a paired-samples t-test, we are looking
to see if there are significant differences between the means of
two independent groups, each measured on a different level of the
independent variable.
True or False
If the p-value is > than 0.05, the...
Summary statistics are given for independent simple random
samples from two populations. Use the nonpooled t-test...
Summary statistics are given for independent simple random
samples from two populations. Use the nonpooled t-test to conduct
the required hypothesis test.
x1 = 12.5, SJ = 3.9, n1 = 14, x2 = 13.5, s2 = 5.2, n2 = 17 20)
--- Perform a left-tailed hypothesis test using a significance
level of a = 0.05.
A) Test statistic: t = -0.611 Critical value = - 1.701Do not
reject Ho
B) Test statistic: t = -2.211 Critical value= -1.699 Reject
Ho...
HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to...
HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to explore different treatment methods to
effect memory skills in high school freshmen. Subjects were given a
memory test (under multiple conditions) these were the results:
Group 1
10, 8, 9, 11,
8, 9, 7, 6,
9, 8
Group 2
12, 10,
11, 9, 13, 8, 9, 12, 11, 11
Group 3
10, 9, 10, 9, 11,
8, 7, 9, 10, 11...