Question

For each problem a) State the null and alternative hypotheses, b) Verify that the requirements that allow use of the normal model to test the hypothesis are satisfied, c) Show work for calculating the test statistic, d) Compare the critical value with the test statistic, and e) State the conclusion.

1) The proportion of people who cover their mouth when they sneeze is 0.733. Sue observed 150 randomly selected people sneeze and found that 114 covered their mouth when they sneezed. Is there evidence to conclude that the proportion of people who cover their mouth when they sneeze is more than 0.733? Use an α = 0.10 level of significance.

Answer #1

For each problem a) State the null and alternative hypotheses,
b) Verify that the requirements that allow use of the normal model
to test the hypothesis are satisfied, c) Show work for calculating
the test statistic, d) Compare the critical value with the test
statistic, and e) State the conclusion.
The standard deviation of the waiting times experienced by
patients in the minor emergency department of a local hospital is
0.5 minutes. A random sample of 25 waiting times has...

a) State the null and alternative hypotheses, b) Verify that the
requirements that allow use of the normal model to test the
hypothesis are satisfied, c) Show work for calculating the test
statistic, d) Compare the critical value with the test statistic,
and e) State the conclusion. The mean annual cost of raising a
child (age 2 and under) by husband-wife families in the U.S. is
$13,960. In a random sample of husband-wife families in the U.S.,
the mean annual...

1) For each problem, state the null and alternative hypotheses,
calculate the critical value(s) of the statistic by which you would
reject the null hypothesis and state whether or not you would
reject the null hypothesis for a level α specified by each problem.
If the hypothesis test requires an unpaired t-test, then you may
assume that the population variances are equal. Then calculate the
appropriate statistic value by hand and use the appropriate
probability table to obtain the exact...

a) State the null and alternative hypothesis.
b) Select the distribution to use.
c) Write the decision rule. (Define the rejection region.)
d) Calculate the test statistic.
e) Calculate the p-value.
f) Make a decision.
g) (Additional step for this worksheet) State the type I and II
error in context of the problem.
It has been reported that the average credit card debt for
college seniors at the college book store for a specific college is
$3262. The student senate...

1.For each situation, state the null and alternative hypotheses:
(Type "mu" for the symbol ?μ , e.g. mu >>
1 for the mean is greater than 1, mu
<< 1 for the mean is less than 1, mu not =
1 for the mean is not equal to 1. Please do not include
units such as "mm" or "$" in your answer.)
Harry thinks that prices in Caldwell are higher than the rest of
the country. He reads that the nationwide average...

For each of the following situations do the following:
1: state the null and alternative hypothese in statistical
notation.
2; indicate whether a one-tailed or two tailed test is
appropriate
3. for question A. only, define the parameters
A. The US Food and Drug Administration wants to test a new
prescription drug by the upjoh comapny to detemine if less than 3%
of people suffer a certain side effect as claimed by the
company.
B. The National Academy of Scicences...

In 1995, 40% of adolescents stated they prayed daily. A
researcher wants to know whether this percentage has risen since
then. He surveys 50 adolescents and finds that 28 pray on a daily
basis. Is this evidence that the proportion of adolescents who pray
daily has increased at the ∝= 0.05 level of significance? Be sure
to verify that the requirements that allow use of the normal model
to test the hypothesis is satisfied.
state null and alternative hypotheses,
•...

For each hypothesis test, you must state (a) hypotheses,
(b) test statistic, p-value, (c) rejection rule, and (d) both parts
of the conclusion. It is only necessary to calculate the
effect size if the problem calls for it. Use a .05 level of
significance for all hypothesis tests. Use StatCrunch to complete
all hypothesis tests and confidence intervals. Make sure you copy
and paste the relevant output for the solutions
(10 points) In a sample of 100 people who do...

A random sample of 200 voters over the age of 60 were asked
whether they thought Social Security benefits should be increased
for people over the age of 65. A total of 95 of them answered yes.
A random sample of 150 voters aged 18-25 were asked the same
question and 63 of them answered yes. Can you conclude that the
proportion of voters who support an increase in Social Security
benefits is greater among older voters? Use the alpha=...

The Basic Steps to Calculating a Hypothesis
Test
You want to start by determining whether you are interested in
working with a mean or a proportion. Then identify each of the
parts listed below.
In order to use the formulas for a hypothesis test we first
need to confirm that the sample size requirements for the central
limit theorem are satisfied. See the notes for more information. If
the sample size is not met acknowledge that you need to proceed...

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