KIN222 Lecture Notes - Lecture 9: Type I And Type Ii Errors, Repeated Measures Design, Null Hypothesis
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Chose the correct answers on one through 15(plese help)
1.A research group hypothesizes that successful infection by HIVdepends upon the expression of FSH3, a human gene. They overexpressthis gene in T cells (Which HIV normally infects) so that FSH3protein levels are very high in these cells. In other T-cells, theymutate FSH3 so that none of its encoded protein is made. They thenmeasure HIV infection rate in the control, overexpression, andmutant T cells. The three cultures are otherwise grown in the sameway.
What is the independent variable(s) in this experiment? (Selectall correct answers)
FSH3 protein levels | ||
The medium in which cells are grown | ||
The temperature at which cells are grown | ||
HIV resistance of cells |
Question 2
Which arises from an error in a measurement or observation?
Technical variability | ||
Biological variability | ||
Standard error | ||
Standard deviation |
Question 3
Use the following description of an experiment to answer thenext question.
A research group hypothesizes that successful infection by HIVdepends upon the expression of FSH3, a human gene. They overexpressthis gene in T cells (Which HIV normally infects) so that FSH3protein levels are very high in these cells. In other T-cells, theymutate FSH3 so that none of its encoded protein is made. They thenmeasure HIV infection rate in the control, overexpression, andmutant T cells. The three cultures are otherwise grown in the sameway.
What is the control group(s) in this experiment? (Select allcorrect answers)
The unaltered T cells | ||
The medium in which cells are grown | ||
The T cells in which FSH3 is mutated | ||
The T cells overexpressing FSH3 |
Question 4
How many of the following statements are true?
I. All papers have an abstract, methods, results, and discussionsection
II. The methods always follows the introduction
0 | ||
2 | ||
1 |
Question 5
If scientific convention states that when a P value of less than0.05 is considered significant (in other words, the two groupsbeing measured are actually different), this means that: (Selectall correct answers)
If you were to repeat the experiment 100 times, there would notbe a significant difference between the groups in 5 of theexperiments | ||
95% of all conclusions that state two groups are not differentbased on a 0.5% p-value threshold are false negatives | ||
The groups are actually not different from each other 95% of thetime | ||
5% of all conclusions that state two groups are different basedon a 0.5% p-value threshold are false positives |
What information is typically found in the introduction sectionof a paper? (Select all that apply)
The dependent and independent variables within the study | ||
Which areas of the field are not well understood and whatquestion the study addresses | ||
How the main question of the paper is related to other researchin the field. | ||
How previous work forms the basis for the current study | ||
The purpose of the study | ||
Details of the approaches used | ||
A summary of relevant related studies |
Question 7
How can you judge for yourself whether the conclusions reachedin a paper are valid? (Select all that apply)
Read papers of other authors studying the same question or areaof inquiry | ||
Determine if each hypothesis is supported by different types ofevidence/approaches. | ||
Consider closely whether the data actually both addresses andsupports the authorâs hypothesis. | ||
Examine the amount of data in the paper, and how long the paperis. | ||
Whether the authors find a mechanism, or exactly how on variableaffects another. | ||
Interpret the data for yourself without looking the discussion,then compare your interpretations to that of the authorâs. |
Question 8
Where can you usually find the institutional affiliations (wherethey work) of the authors?
Within the discussion | ||
In the acknowledgements section | ||
Below the authors list | ||
This is not usually included in papers |
Question 9
Other than publishing primary research articles, what is themain way scientists disseminate their results?
Lab meetings | ||
Personal correspondence | ||
Conference seminars | ||
Public lectures |
Question 10
Use the following description of an experiment to answer thenext question.
A research group hypothesizes that successful infection by HIVdepends upon the expression of FSH3, a human gene. They overexpressthis gene in T cells (Which HIV normally infects) so that FSH3protein levels are very high in these cells. In other T-cells, theymutate FSH3 so that none of its encoded protein is made. They thenmeasure HIV infection rate in the control, overexpression, andmutant T cells. The three cultures are otherwise grown in the sameway.
What is the experimental group(s) in this experiment? (Selectall correct answers)
Each group is its own control | ||
The T cells overexpressing FSH3 | ||
The T cells in which FSH3 is mutated | ||
The unaltered T cells |
1).
A consumer spends more time searching for a good when her reservation price is:
increased.
reduced.
fixed.
None of the statements is correct.
2).
In the game shown below, firms 1 and 2 must independently decide whether to charge high or low prices.
Which of the following are Nash equilibrium payoffs in the one-shot game?
(0, 0)
(5, -5)
(-5, 5)
(10, 10)
3).
A risk-neutral individual would:
prefer $5 with certainty to a risky prospect with the expected value of $5.
prefer a risky prospect with an expected value of $5 to a certain amount of $5.
be indifferent between a risky prospect with an expect value of $5 to a certain amount of $5.
prefer a risky prospect with the expected value of $0.50 to $5 with certainty.
4).
Snowpeak Ski Resort offers a price for a lift ticket that is barely over its marginal cost, but the high equipment rental fee keeps generating big profits. Which pricing strategy is the management using?
Price discrimination
Two-part pricing
Commodity bundling
Cross-subsidization
5).
The short run is defined as the time frame:
in which there are no fixed factors of production.
in which there are fixed factors of production.
less than one year.
less than three years.
6).
Fixed costs exist only in:
the long run.
capital-intensive markets.
the short run.
labor-intensive markets.
7).
Top of Form
Non-fed ground beef is an inferior good. In economic booms, grocery managers should:
increase their orders of non-fed ground beef.
reduce their orders of non-fed ground beef.
not change their orders of non-fed ground beef.
neither increase, reduce, nor maintain their current orders for non-fed ground beef.
Bottom of Form
8).
Which of the following pricing strategies is NOT used in markets with special cost and demand structures?
Peak-load pricing
Cross-subsidization
Transfer pricing
Low-price guarantees
9).
A perfectly competitive firm faces a:
perfectly elastic demand function.
perfectly inelastic demand function.
demand function with unitary elasticity.
None of the answers is correct.
10).
The special demand structure that induces a firm to use a cross-subsidization strategy is:
perfect substitution among products.
imperfect substitution among products.
independent demand for products.
interdependent demand for products.
11).
Which of the following factors reduces the need for government involvement in the marketplace?
The presence of externalities
The incentive to rent-seek
The need for public goods
Incomplete information
12).
Which of the following statements is true?
A mineral rights auction is not the same as a common-value auction.
An auctioneer is always indifferent between different kinds of auctions.
The Dutch and first-price, sealed-bid auctions are strategically equivalent.
An English auction always yields lower expected revenues than a second-price, sealed-bid auction.
13).
Which of the following is true concerning negative externalities?
Firms tend to produce more than the efficient level of output.
Society gains because firms do not pay the external costs of production.
Perfect competition is better than monopoly from the viewpoint of society even in the presence of negative externalities.
With negative externalities, a monopoly will always produce an output level less than is socially efficient.
14).
Which of the following is true under monopoly?
P > ATC
P > MC
P = MR
P = ATC
15).
Differentiated goods are NOT a feature of a:
perfectly competitive market.
monopolistically competitive market.
monopolistic market.
perfectly competitive market and monopolistic market.
16).
Producer surplus is measured as the area
below the demand curve and above the market price.
above the demand curve and below the market price.
above the supply curve and below the market price.
below the supply curve and above the market price.
17).
Jaynet spends $25,000 per year on painting supplies and storage space. She recently received two job offers from a famous marketing firm â one offer was for $105,000 per year, and the other was for $85,000. However, she turned both jobs down to continue a painting career. If Jaynet sells 30 paintings per year at a price of $9,000 each:
a. What are her accounting profits?
$
b. What are her economic profits?
$
18).
You are the manager of a monopoly that sells a product to two groups of consumers in different parts of the country. Group 1âs elasticity of demand is -2, while group 2âs is -4. Your marginal cost of producing the product is $40.
a. Determine your optimal markups and prices under third-degree price discrimination.
Instruction: Round your answers to two decimal places.
Markup for group 1:
Price for group 1: $
Markup for group 2:
Price for group 2: $
b. Which of the following are necessary conditions for third-degree price discrimination to enhance profits.
Instructions: You may select more than one answer. Click the box with a check mark for the correct answers and click twice to empty the box for the wrong answers. You must click to select or deselect each option in order to receive full credit.
| At least one group has elasticity of demand less than one in absolute value. | |
| There are two different groups with different (and identifiable) elasticities of demand. | |
| We are able to prevent resale between the groups. | |
| At least one group has elasticity of demand greater than 1 in absolute value. |
19).
You are the manager of a firm that receives revenues of $60,000 per year from product X and $80,000 per year from product Y. The own price elasticity of demand for product X is -1.5, and the cross-price elasticity of demand between productY and X is -1.4.
How much will your firm's total revenues (revenues from both products) change if you increase the price of good X by 2 percent?
Instructions: Round your answer to the nearest dollar. Include a minus (-) sign if applicable.
$
