Which of the following is an example of a continuous variable?     The gender of each student in a psychology class     The number of males in each class offered by the college     The amount of time to solve a problem     The number of children in a family

For each of the following scenarios, indicate whether the relationship between the two variables is positive or negative, as well as which line on the previous graph has a slope that reflects this type of relationship.   Hint: The X-axis and Y-axis on the graph are not labeled intentionally. You need to substitute the variables from each scenario for the horizontal and vertical axis. For example, in the first scenario, X-axis should be labeled “ ice-cream" and Y-axis should be labeled "The temperature". Relationship options: positive, negative Line options: A, B, C, D   True or False: Line D has a slope of infinity.

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Is there any graph that can support this answer?

Econometrics   Thomas Eisensee and David Stromberg wanted to measure how much news coverage of a foreign disaster impacted the amount of disaster relief provided by the U.S. government. They argue that the simple relationship would be biased.   Let X = Minutes of News Coverage and Y= Disaster Aid. Choose a variable X2 that could bias the simple relationship. This variable should impact the amount of coverage and impact the amount of aid for reasons other than purely news coverage.    Eisensee and Stromberg introduce an instrument Z = During the Olympics. Explain how Z could satisfy the relevant and exogenous criteria.    Explain how you could use Z to estimate the impact of X on Y free from X2 bias. Hint: you should mention two stages.

The demand for a 12-ounce bottle of sparkling water is given in the table. Demand Schedule for Sparkling Water in 12-ounce Bottles Price (dollars per bottle) 2.29 2.69 3.09 3.49 3.89 4.29 Demand (million bottles) 25 9 3 2 1 0.5 (a) Write the function for the exponential model that gives demand in million bottles, as a function of price per bottle p, with data from 2.29 s ps 4.29. (Round all numerical values to two decimal places. Be sure you use the correct input variable p.) D(p) = Does the model indicate a price above which consumers will purchase no bottles of water? The model is exponential and ---Select--- the horizontal axis. Therefore there is --Select--- above which consumers will not purchase water. (b) What quantity of water will consumers purchase when the market price is $4.09? (Round your answer to two decimal places.) million bottles (c) Calculate the amount that consumers willing and able to spend to purchase the quantity found in part (b). (Round your answer to one…

Given the following data table: X Y 21 68 72 55 38 59 57 57 45 61   What is the correlation between X and Y? Include 3 decimal places in your answer.

When creating a scatter chart for supply and demand curves the Y axis contains the price and the X axis contains the quantity. O True O False

(Figure: Graph) Refer to the graph to answer the question. Price S M P Quantity The movement from point S to point T is caused by an increase in the demand for the item. a decrease in the price of the item. an increase in the price of the item. a decrease in the demand for the item.

Suppose researchers use observational data to study the effect of class size and teacher experience on student score. Which of the following is a confounding variable? Student score 0000 Family income Class size Teacher experience