Question

**True or False**

To compare the means of three groups, we can use t-test instead of ANOVA.

Answer #1

Thank you...!!!

True or False: For all hypothesis tests, a small p-value means
we will reject the null.
True or False: If you are testing the means of two groups, then
you would use ANOVA.
True or False: A two-sample confidence interval must capture
zero to show the groups are different.
True or False: The test statistic for ANOVA is the
f-statistic.
True or False: For Chi-Square tests, if the observed counts and
expected counts are extremely different, then we would have...

Suppose we want to test whether or not three means are equal. We
want to perform this test with a 4% significance level.
If we perform an ANOVA test, what is the probability of the test
producing accurate results (avoiding a Type I error)?
Suppose we, instead, run three separate hypothesis tests
(t-tests), each with 4% significance level.
Mean 1 = Mean 2
Mean 1 = Mean 3
Mean 2 = Mean 3
What is the probability that all three...

Even though ANOVA is comparing means of different groups, we use
the F to test our hypotheses. So why do we do this?

Generally, we compare two independent sample means via
independent two-sample t test. Is it possible to compare two
independent sample means using ANOVA? Please provide a explanation
and an example.

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...

True or False?
A) You do a hypothesis test on 2 means, if you reject H0 at the
significance level of 10%, then you will reject H0 at the
significance level of 5%. T or F?
B) If the variances of 2 normal populations are unknown but
assumed to be unequal, the appropriate statistic to compare the 2
means is the t of student (we assume here a small sample) . T or
F?
C) If the variances of 2...

Provide examples of how the t test and ANOVA could be used to
compare means within your work environment or domain of interest.
Discuss the appropriateness of using the t test versus ANOVA.

8) Arnold compares the means of three groups and calculates a
value of -2.01 for the F ratio. This necessarily implies that. .
Group of answer choices
a. the mean of the first group is the highest of the three
groups
b. the mean of the third group is the highest of the three
groups
c. the differences between the means are statistically
significant
d. he made an error is his calculation
9) The problem with conducting multiple t-tests instead...

For the t-test alone there are three variants based on the
independence of the groups and whether we can assume variances the
same or variances between the groups as different. The variances
issue is easy as we can always assume they are different as the
test is robust to accept any variances but the dependent pairs is
different. Why is it different and how might you use it?

1A. the most appropriate t-test if you are comparing means for
two separate groups that have no relationship to each other?
paired samples t-test
independent samples t-test
dependent samples t-test
none of the above
Which of the following tests are necessary to find out the
details of ANOVA?
Chi-Square
correlation
regression
post hoc test

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