Question

For the following problems, identify the hypotheses, define Type I and Type II errors, and discuss the consequences of each error. (When you set up the hypotheses, consider which is the hypothesis you are ”trying to prove”, and that is your alternative. The null hypothesis is then the status quo.)

a. The FDA judges the safety of new drugs. When faced with a new drug, there are two possible decisions: approve the drug or disapprove the drug.

b. You are faced with two investments. One is very risky, but potential returns are high, while the other one is safe but the potential is quite limited. Pick one.

Answer #1

3) The amount of time it takes for a grocery clerk to check out
a customer is evenly distributed between 1 and 5 minutes.
a. What kind of distribution is this?
b. What is the probability that it will take more than 4 minutes
to check out the customer?
c. What is the probability that it will take between 2 and 4
minutes?
d. What is the probability that it will take exactly 2
minutes?
4) A bank wishing to...

Describe type I and type II errors for a hypothesis test of the
indicated claim. A shoe store claims that at least 80% of its new
customers will return to buy their next pair of shoes.
Describe the type I error. Choose the correct answer below:
a) A type I error will occur when the actual proportion of new
customers who return to buy their next pair of shoes is no more
than 0.80 but you reject H0: p≤0.80.
b)...

1) What are Type I and Type II errors?
2) Why do we use pˆ (p-hat) in place of p when doing confidence
intervals but use p0 (‘p naught’) in
place of p when doing hypothesis tests?
3) What are the two criteria used to choose the best estimator
for a population parameter?
4) Suppose you have calculated a confidence interval for a
single mean with alpha equal to 0.05, and the
interval ranges from 5 and 10. Describe in...

WEEK 7, PRACTICE QUESTIONS (FROM THE BOOK)
Prerequisites
• All material presented in the Logic of Hypothesis
Testing chapter
1. An experiment is conducted to test the claim that James Bond
can taste the difference between a Martini that is shaken and one
that is stirred. What is the null hypothesis?
2. The following explanation is incorrect. What three words
should be added to make it correct?
The probability value is the probability of obtaining a
statistic as different (add...

Do all the following problems.
I. Choose the best answer for each
multiple choice. Please use CAPITAL letters to indicate your answer
and write neatly. (30 points)
1. ____ 4.____ 7. ____ 10.____ 13.
____
2. ____ 5.____ 8. ____ 11.____ 14.
____
3. ____ 6.____ 9. ____ 12.____ 15.
____
Whenever the population standard deviation is unknown and the
population has a normal or near-normal distribution, which
distribution is used in developing an interval estimation?
A. standard distribution
B....

For each of the following scenarios, identify:
the population of interest,
the outcome variable being measured on each observational
unit,
whether the outcome variable being measured is categorical
or quantitative/Continuous,
the parameter of interest, define both in words and using the
appropriate statistical symbol (π, π1 -π2, µ, µ1 - µ2, or µd),
and
the null and alternative hypotheses, written in correct
statistical notation (not in words)
Name the hypothesis test you would use. For example, some tests
we have...

________ client-centered therapy centers on the patient's goals
and ways of solving problems.
Select one:
a. Rogers'
b. Freud's
c. Beck
d. Ellis
Question 2
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Question text
A frequently prescribed drug therapy for managing one's
depression is ____________.
Select one:
a. Adderall
b. Lithium
c. Prozac
d. Thorazine
Question 3
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Question text
A major goal of modern inpatient psychiatric treatment is:
Select...

Read the following case carefully and then answer the
questions.
In the movie Face/Off, John Travolta got a new look by
exchanging faces with Nicolas Cage. Unfortunately, he got a lot of
trouble along with it. John could receive a much less troublesome
new look by using Botox, a treatment discovered by Vancouver’s Dr.
Jean Carruthers, who came upon the cosmetic potential of Botox in
1982 while treating a woman with eye spasms.
Botox is marketed by Allergan, a specialty...

Discuss ethical issues that can be identified in this
case and the mode of managing ethics Enron finds itself in this
case. How would you describe the ethical culture and levels of
trust at Enron? Provide reasons for your assessment.
THE FALL OF ENRON: A STAKEHOLDER FAILURE
Once upon a time, there was a gleaming headquarters
office tower in Houston, with a giant tilted "£"' in front, slowly
revolving in the Texas sun. The Enron Corporation, which once
ranked among...

Please read the case and answer the questions below: 1-3
The employer publishes the South Texas Clarion daily newspaper,
employing 726 carriers on 780 routes through the rural Rio Grande
river valley. In addition to the Clarion, the carriers deliver
seven other newspapers e.g., The Wall Street Journal. The employer
operates four distribution centers (warehouses) where carriers pick
up the papers to take on their routes. Each distribution center has
general manager and several "District Managers" who supervise the
work...

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