Question

**I need to know if this is right or left tailed and what
the P-Value is!**

For the following, Use the five-step approach to hypothesis testing found on page 8-16. It states. You can use excel to compute the data or you can do it by hand. The YouTube videos provided in the links will walk you through the steps to complete the following problems.

- State the hypothesis and identify the claim.

H0:

H1:

- Find the critical value and determine what error level to use. For all the problems on this homework use an alpha level of .05 Determine if the test is right tailed, left tailed or non-directional.
- Compute the test Value It will be an ANOVA,
- Make a decision to reject or fail to reject the null hypothesis.
- Summarize the results

Problem #2 You are a researcher who wants to know if there is a difference in the means of three different groups you have been working with to stop smoking. You have randomly selected 15 smokers and randomly placed them into three groups. Group one receives traditional treatment, pamphlets and videos on the health risks of smoking. Group two receives a fake treatment in the form of a daily pill, this is a placebo. The third group will receive motivational interviewing treatment within their weekly counseling sessions. All smokers in the three groups smoke on average 20 cigarettes a day. You hypothesize that there will be some difference between the three groups or within the three groups. Using an alpha level of .05, use the five-step approach to reject or fail to reject the HO: that all three groups will have equal means. Remember to report the P value as well. Critical values to determine the critical region can be found using table H on page 654. You must find the degrees of freedom for the numerator and the denominator. The following data shows how many cigarettes group participants smoked after eight weeks of treatment.

Group 1 Group 2 Group 3

20 18 6

18 20 3

21 23 1

17 19 2

19 18 1

Answer #1

You are the researcher and you develop a hypothesis. It states
that by providing relaxation therapy to a group of 10 smokers who
average 20 cigarettes a day, you hypothesize that they will reduce
the number of cigarettes they smoke after eight weeks of therapy.
You will take measurements on the group you have provided
relaxation therapy to after eight weeks and the mean is 16
cigarettes. You compare the mean to two other groups who did not
receive the...

Find the P-value for the hypothesis test with the standardized
test statistic z = 0.52, Right-tailed test, and level of
significance = 0.05. Decide whether to reject H0 or fail to reject
H0.

For the following problems, (a) identify null hypothesis,
alternative hypothesis, (b) determine whether it is left-tailed,
right-tailed, or two-tailed, (c) find the p-value, (d) make the
decision whether you reject the null hypothesis or fail to reject
the null hypothesis, and e) interpret your result.
4). A medical researcher says that less than 80% of U.S. adults
think that healthy children
should require to be vaccinated.
In a random sample of 200 U.S. adults, 164 think that
healthy...

1.
For this problem you will need a t-table. What is the t-value
needed for a confidence interval with a sample size = 25 and alpha
=.05?
Group of answer choices
2.064
2.060
1.708
1.706
2.
Small Sample Mean Problem. The maker of potato chips uses an
automated packaging machine to pack its 20-ounce bag of chips. At
the end of every shift 18 bags are selected at random and tested to
see if the equipment needs to be readjusted....

One sample has n = 18 with SS = 5,471, and a second sample has n
= 18 with SS = = 5,545.
Find the pooled variance for the two samples.
S2p = ________
Compute the estimated standard error for the sample mean
difference.
S(m1-m2) = ___________
If the sample mean difference is 12.00 points, is this enough to
reject the null hypothesis and conclude that there is a significant
difference for a two-tailed test at the .05 level? (Use...

a) Identify the claim: state the null and alternative
hypotheses. b) Determine the test: left-tailed, right-tailed, or
two-tailed. c) Graph your bell-shaped curve and label your levels
of significance or critical value. d) Find your standardized test
statistic ? and label it on your graph. e) Decide whether to reject
or fail to reject the null hypothesis. f) Interpret your
result.
A study was conducted to determine if the salaries of elementary
school teachers from two neighboring states were equal....

If we know the population standard deviation, we can use which
table to do a hypothesis test?
Group of answer choices
Z-table
T-table
Critical table
Significant table
In the critical value approach, to make a decision, we compare
the critical value with the:
Group of answer choices
Test statistic
p-value
Hypothesized value
Population parameter
In the critical value approach, if we are doing a two-tailed
test, we do not know the population standard deviation, and we find
that the test...

A psychologist obtains a p-value of 0.03 for an ANOVA examining
the difference between three treatment groups. They are using an
alpha (?) of 0.05. They want to compare each group to the other
(for a total of three comparisons). What alpha level should they
use for each of these comparisons?

Question 1:
Let's say that instead of recruiting 20 smokers and assigning
them each to one condition, we decided to try to minimize our error
variance by recruiting 10 smokers, measuring how much they smoke in
a week before the hypnosis treatment, then conducting the treatment
and measuring them again after. Use the data from Question 1, only
now take note of the "Participant" column in addition to the
"Group" and "Cigarettes" columns. You can see that you have a...

Past studies have indicated that the percentage of smokers was
estimated to be about 30%. Given the new smoking cessation programs
that have been implemented, you now believe that the percentage of
smokers has reduced. You randomly surveyed 2361 people and found
that 664 smoke. Use a 0.05 significance level to test the claim
that the percentage of smokers has reduced.
a) Identify the null and alternative
hypotheses?
H0H0: Select an answer p = p ≠ p < p >...

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