Question

What is the difference between a one sample and a two sample test? What do you further have to address if you are drawing on two samples for your test?

Answer #1

one sample t test is used when we want to know whether our sample comes from a particular population but we do not have full population information available to us.used when we dont know the variance.

Two sample t test

to compare the responses from two groups.these two groups can come from different experimental treatments ,or different "populations"

t? What do you further have to address if you are drawing on two samples for your test?

compares one sample mean versus another sample mean

Independent t-tests(equal samples)

Dependent t tests(dependent /paired samples)

In looking at the difference between two sample proportions or
the difference between two sample means, why does one need
independence between the two samples in order to construct
confidence intervals for the difference or do a hypothesis test for
the difference?

what is the difference between a one and a two sample hypothesis
test, and does this changes how the results are going to be
interpreted.

What is the difference between a One sample
t-test, Unpooled t-test, Pooled
t-test, Paired t-test, and Mann
Whitney U test? How do you know when to use each test?

discuss the differences between a one-sample z-test, one-sample
t-test, the independent samples t-test and the dependent samples
t-test. Specifically, under what circumstances would you conduct
each test and what type of information comes from a known/defined
population versus your sample data?

1. In one-sample t test, the difference between the mean
of your sample and μ increases. Will t-value and P-value will
increase, decrease, get closer to zero, or farther from
zero?
2. In a one sample t test, the variance of your sample
increases. Will t-value and P-value will increase, decrease, get
closer to zero, or farther from zero?
3. In a two sample t test, the difference between the
means of your samples decreases. Will t-value and P-value will...

Hypothesis Test: Difference Between Means
Sample A: 20 Observations
Sample B: 43 Observations
My question is: Can I run an hypothesis test for the difference
between means with a small sample(20) and a large sample(43)? If
so, what are the steps?
PS: I usually deal with exercises where the two samples have
equal amount of observations.

11 . Choosing the appropriate test statistic
You are interested in the difference between two population means.
Both populations are normally distributed, and the population
variances σ212 and σ222 are known. You use an independent samples
experiment to provide the data for your study. What is the
appropriate test statistic?
F = √[2/n1 + 2/n2]
F = s1/s2
z = (x̄1 – x̄2) / √[σ2/n1 + σ2/n2]
z = (p̂1 – p̂2) / √[p̂(1 – p̂)(1/n1 + 1/n2)]
Suppose instead...

magine that you have conducted a two-sample test and determined
that the difference was not statistically significant. While one
mean was 4.3 and the other was 3.9, the p level for the t test was
p=.07. Your management team says, “Well, the difference may not be
statistically significant, but the difference is there! Discuss how
you would respond

What is the difference between a one-tailed test and a
two-tailed test?
Multiple Choice
In a one-tailed test, the rejection region is in one of the
tails, whereas in a two-tailed test the area of rejection is
“split” between both tails of the distribution.
In a one-tailed test, the rejection region is always in the
upper tail, whereas in a two-tailed test the area of rejection is
“split” between both tails of the distribution.
In a one-tailed test, the p-value...

What is the difference between a t test for independent
samples and a t test for related (dependent) samples?
Give an example of when you would use each?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 41 minutes ago

asked 49 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago