Question

(a). The population is still all days that Parsnip has been alive, and the parameter of interest is = the proportion of all days in which Parsnip eats all the food he is given. It is conjectured that the proportion of all days that he has been alive that Parsnip eats all the food he is given is 0.75, and of interest is to test this claim versus the alternative that the proportion of all days in which Parsnip eats all the food he is given is less than 0.75. State the appropriate null and alternative hypotheses that should be tested.

(b). A simple random sample of 80 days is selected; 56 of those days Parsnip ate all the food he was given, and the other 24 days he did not eat all the food he was given. If appropriate, use this information to test the hypotheses stated in part (a) at significance level = .10.

Answer #1

A.) Now the population is all senior living facilities in the
United States. It is conjectured that the mean number of positive
COVID-19 cases per 100 residents is 40, and of interest is to test
the conjecture versus the alternative that the mean number of
positive COVID-19 cases per 100 residents is different from 40.
State the appropriate null and alternative hypotheses that should
be tested.
B.) Consider the information and hypotheses specified in the
above part a.. A simple...

(a)The population is all VCU faculty, and of interest is to
compare the mean number of Zoom meetings they attended in March
2020 to the mean number of face-to-face meetings they attended in
March 2020. It is conjectured that the mean number of Zoom meetings
in March 2020 and the mean number of face-to-face meetings in March
2020 attended by all VCU faculty are the same, and of interest is
to test this conjecture versus the alternative that the two...

Suppose the first population is all face-to-face meetings held
in March 2020, the second population is all Zoom meetings held in
March 2020, and the parameter of interest is μ1 – μ2 = the
difference in the mean length of all face-to-face meetings and the
mean length of all Zoom meetings. The meeting lengths are measured
in minutes. For both face-to-face meetings and Zoom meetings the
distributions of meeting times are skewed heavily to the right due
to some meetings...

Suppose the first population is all face-to-face meetings held
in March 2020, the second population is all Zoom meetings held in
March 2020, and the parameter of interest is μ1 –
μ2 = the difference in the mean length of all
face-to-face meetings and the mean length of all Zoom meetings. The
meeting lengths are measured in minutes. For both
face-to-face meetings and Zoom meetings the distributions of
meeting times are skewed heavily to the right due to some meetings...

Assume that a simple random sample has been selected from a
normally distributed population and test the given claim. Use
either the traditional method or P-value method as indicated.
Identify the null and alternative hypotheses, test statistic,
critical value(s) or P-value (or range of P-values) as appropriate,
and state the final conclusion that addresses the original claim. A
test of sobriety involves measuring the subject's motor skills.
Twenty randomly selected sober subjects take the test and produce a
mean score...

Assume that a simple random sample has been selected from a
normally distributed population and test the given claim. Use
either the traditional method or P-value method as indicated.
Identify the null and alternative hypotheses, test statistic,
critical value(s) or P-value (or range of P-values) as appropriate,
and state the final conclusion that addresses the original claim.
36) In tests of a computer component, it is found that the mean
time between failures is 520 hours. A modification is made...

A large number of complaints has been received in the past six
months regarding airlines losing fliers' baggage. The airlines
claim the problem is nowhere near as great as the newspaper
articles have indicated. In fact, one airline spokesman claimed
that less than 1% of all bags fail to arrive at the destination
with the passenger. To test this claim, 800 bags were randomly
selected at various airports in the United States when they were
checked with this airline. Of...

The distribution of blood cholesterol level in the population of
all male patients 20–34 years of age tested in a large hospital
over a 10-year period is close to Normal with standard deviation σ
= 48 mg/dL (milligrams per deciliter). At your clinic, you measure
the blood cholesterol of 14 male patients in that age range. The
mean level for these 14 patients is x̄ = 180 mg/dL. Assume that σ
is the same as in the general male hospital...

From previous studies, it has been generally believed that
Northern Hemisphere icebergs have a mean depth of 270 meters. An
environmentalist has suggested that global warming has caused
icebergs to have greater depth. A team of scientists visiting the
Northern Hemisphere observed a random sample of 41 icebergs. The
depth of the base of the iceberg below the surface was carefully
measured for each. The sample mean and standard deviation were
calculated to be 276 meters and 20 meters respectively....

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...

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