Question

_____11) If the null hypothesis is that the population mean is equal to 150 and a sample

mean of 113 gave significant support against the null hypothesis, which of the

following sample means would be certain to give support against the null

hypothesis.

a) 114 b.) 122 c.) 264 d.) 112

_____12) If the p-value is less than the significance level, you would .

a.) reject the null hypothesis b.) accept the null hypothesis

c.) accept the rejection region d.) accept the test statistic

_____13) If the null hypothesis has been accepted and there truly exists a significant

difference, what type of error has been made?

a) none b) type II c) type I d) type III

_____14) If a directional hypothesis is legitimate, which will have greater statistical power?

a.) a one-tailed test b.) a two-tailed test

c.) both will have the same power d.) you can’t run a two tailed test

15)___________ A study was conducted to test the effectiveness of aspirin on reducing

fatal heart attacks. Two different groups were used in the study. The

16)____________ control group (n = 20) received placebos and the experimental group

(n = 20) received the aspirin. After four years, 10 of the control group

17____________ and 4 of the experimental group participants died of fatal heart attacks.

Use a significance level of .01 and test to see if there was a significant

reduction in the number of fatal heart attacks in the experimental group.

**List the** 15)
test statistic 16) P-value 17) whether to reject or accept
Ho.

18)____________ The Mill Valley Brewery distributes soda bottles labeled 12 oz. The

Bureau of Weights and Measurements randomly selects 40 of these

19)____________ bottles and measures their contents. They obtain a sample mean of 11.8

oz and a sample standard deviation of 0.24 oz. Using a significance

20)____________ level of .05, test the Bureau’s claim that the brewery is cheating

consumers.
**List the** 18) test statistic 19)
p-value 20) whether to accept

or reject the null hypothesis.

Answer #1

11) Answer: **c.) 264**

----------

12) If the p-value is less than the significance level, you would .

Answer: **a.) reject the null hypothesis**

-------------

13) If the null hypothesis has been accepted and there truly exists a significant difference, what type of error has been made?

Answer: **b) type II **

--------

14) If a directional hypothesis is legitimate, which will have greater statistical power?

Answer: **a.) a one-tailed test**

--------

Re-post for other answer.

1. A null hypothesis states that there is
A. No significant difference between a population parameter and
sample statistic.
B. A significant difference between a population parameter and
sample statistic.
C. The difference between the population parameter and sample
statistic is significant and can be attributed to sampling
error.
D. The difference between the population parameter and sample
statistic is insignificant and cannot be attributed to sampling
error.
E. None of the above
2. An alternative hypothesis states that there...

1. The P-value of a test of the null hypothesis is
a. the probability the null hypothesis is true.
b. the probability the null hypothesis is false.
c. the probability, assuming the null hypothesis is false, that
the test statistic will take a value at least as extreme as that
actually observed.
d. the probability, assuming the null hypothesis is true, that
the test statistic will take a value at least as extreme as that
actually observed.
2. The P-value...

Questions D-F
d) You conduct a hypothesis test for the
population proportion. After you calculate the z test statistic,
you find that your p-value = 0.059. Using alpha (α) = 0.05 level of
significance, what is your decision regarding the null hypothesis?
Choose from the following.
- Reject the null hypothesis and reject the alternative
hypothesis
- Accept the null hypothesis
- Do not reject the null hypothesis
- Reject the null hypothesis and accept the alternative
hypothesis
e) You...

Which of the following statements about rejecting the null
hypothesis is true? Group of answer choices If the p-value is such
that you can reject Ho for a 5% level of significance, you can
always reject it for a 1% level of significance. If the sample data
is such that for a one-tailed test of the mean you can reject Ho at
the 1% level of significance, you can always reject Ho for a
two-tailed test at the same level...

I would like to test the null hypothesis that the population
mean is 50 versus the alternative that it is not 50. My sample size
is 6 and the sample mean is 38 with sample standard deviation of
16. At α = 0.05, I should:
Group of answer choices
Strongly reject the null hypothesis
Mildly reject the null hypothesis
Fail to reject the null hypothesis
Accept the alternative hypothesis
There is insufficient information to determine

Perform a hypothesis for the null and alternative
hypotheses:
??:?? =? ??:?? <?
The following is the sample information.
?̅=?.? ?? =?.? ?=?? ?=?.??
a. (1 point) Calculate the appropriate test statistic, p-value,
and give a general conclusion of reject or fail to reject the null
hypothesis based on the significance level. Show all work
b. (1 point) Now suppose you know ?? = 1.2. Calculate the
appropriate test statistic, p-value and give a general conclusion
of reject or fail...

Suppose a random sample of 150 universities is used to test the
null hypothesis that the average number of spam emails economics
graduate students receive in a month is
46.92.The value of the test statistic is found to be 1.02
1. If the null is tested against the alternative hypothesis that
the number of spam emails is not 46.92, the smallest significance
level at which you can reject the null hypothesis is.
2. If the null is tested against the...

research hypothesis stating the treatment effect in contrast to
the statement of null effect
alternative hypothesis
central limit theorem
sampling bias
two-tailed test
upper probability value allowed for rejecting the null
hypothesis
significance level
parameter
type 1 error
two-tailed test
drawing conclusions about a population from sample data
empirical data
inferential statistics
discrete distribution
random sampling
Assume that a new treatment for helping alcoholics isn't any
better than an old treatment. A researcher, who doesn't know this,
designs a study...

Then, answer the following five parts:
Write down the null hypothesis.
Write down the alternative hypothesis.
Explain why you chose your hypotheses as such.
Do a hypothesist test of your data at the α = 2% level of
significance for the population proportion by carrying out the
following five steps:
View an example of how to use StatCrunch to compute the value
Zα
If it is a left-tailed test, what is the critical value,
-z0.02?
If it is a right-tailed...

You perform a hypothesis test for a hypothesized population mean
at the 0.01 level of significance. Your null hypothesis for the
two-sided test is that the true population mean is equal to your
hypothesized mean. The two-sided p-value for that test is 0.023.
Based on that p-value... A. you should accept the null hypothesis.
B. the null hypothesis cannot be correct. C. you should reject the
null hypothesis. D. you should fail to reject the null
hypothesis.

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