Question

why is it important to understand the difference between a one tailed and two tailed test

Answer #1

Solution :

We decide the tail of the test based on the sign in H1.

If H1 contains "not equal to" the the test is two tailed.

If H1 contains "<" the the test is left trailed.

If H1 contains ">" the the test is right tailed.

It is important to decide the tail of the test, because it helps in finding p-value and critical value.

If the test one tailed test then p-value is the probability of observing test statistic at only one extreme. While that of two tailed test it is the probability of observing test statistic at both the extremes.

We get only one critical value for one tailed test and two values for two.

That means the tail of the test is crucial part of decision making ( whether to reject or accept H0 ).

explain the difference between physiology and
pathophysiology along with why it is important to understand the
difference.

In a two-tailed hypothesis test of the difference between two
means based on independent random samples, the first sample had 30
observations with a mean of 40 and a standard deviation of 4. The
second sample had 20 observations with a mean of 45 and a standard
deviation of 5. Find the test statistic.

Two-tailed test for difference between two population
means
Is there evidence to conclude that the number of people travelling
from Bangalore to
Chennai is different from the number of people travelling from
Bangalore to Hosur in
a week, given the following:
Population 1: Bangalore to Chennai n1 = 1200
x1 = 452
s1 = 212
Population 2: Bangalore to Hosur n2 = 800
x2 = 523
s2 = 185

It is important to understand that the Wilcoxon
matched pairs test is based on the relative ranks of
a. the negative difference scores
b. the positive difference scores
c. the positive difference scores always being greater than the
negative
d. the difference scores between the matched pairs

What is the difference between real and nominal variables and
why is the difference important? Exlain using one of the components
of aggregate demand as an example.

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 correlation and identity?
Why is it important to distinguish between the two concepts?
Provide an example of a statement that confuses correlation with
identity.
In addition to your main response, you must also post substantive
responses to at least two of your classmatesâ€™ posts in this
thread.

If in a two-tailed, two-sample test of proportions for
independent samples, we fail to reject the null hypotheses, then we
can conclude that
Multiple Choice
a difference exists between the population proportions.
we have no evidence that a difference exists between the
population proportions.
the difference between sample proportions is definitely
zero.
the difference between the population proportions is 1.

What is the reasoning behind the use of a two-tailed test in a
research project? Why are the absolute values of the critical
values in a two-tailed confidence interval the same?

Identify -
1. Is this a one tailed or two tailed test?
2. Null & alternative hypothesis
3. Test Statistic
4. P-value
5. Conclusion about null hypothesis
6. Final conclusion that addresses original claim.
7. Is this a one or two sample test?
A nationwide study of American homeowners revealed that 64% have
one or more lawn mowers. A lawn equipment manufacturer, located in
Omaha, feels the estimate is too low for households in Omaha. Can
the value 0.64 be...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 5 minutes ago

asked 9 minutes ago

asked 21 minutes ago

asked 23 minutes ago

asked 29 minutes ago

asked 42 minutes ago

asked 42 minutes ago

asked 42 minutes ago

asked 55 minutes ago

asked 57 minutes ago

asked 1 hour ago