Zero correlation does not necessarily imply independence between the two variables. This statement is O a. True O b. Depends on mean value of X and Y O c. Depends on r O d. False
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this is an econometrics question please consider that
![Zero correlation does not necessarily imply independence between the two variables. This statement is ..
O a. True
O b. Depends on mean value of X and Y
O c. Depends on r
O d. False](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feaf4aeca-18e3-4295-86d4-17bb3cda93ea%2F59aff5ad-3934-4a09-a2f4-e79e84dc5881%2Fsjwza6q_processed.jpeg&w=3840&q=75)
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- Which type of correlation does the scatter diagram show? A. Weak negative correlation B. Strong positive correlation C. Strong negative correlation D. Weak positive correlation O E. No correlation O O O OWhat is the lowest level of measurement for the data where the mode could bedetermined?A. NominalB. OrdinalC. IntervalD. Ratio Consider a data set of 11 distinct measurements with mean equal to A and median equalto B. If the highest value was decreased to a value smaller than the median B, how wouldthe mean and median be affected?A. The mean and median will both decrease.B. The mean and median will not change.C. The mean will not change and the median will decrease.D. The mean will decrease and the median will not change. What is one distinction between a parameter and a statistic?A. A parameter is only based on conceptual measurements, but a statistic is basedon a combination of real and conceptual measurements.B. A statistic changes every time you try to measure it (using different samples), but aparameter remains fixed.C. A parameter changes each time you try to measure it, but a statistic remains fixedacross samples.D. The true value of a statistic can never be known but the true…What is Nature of a Dummy Variable?
- 10. The measure of proportion or percentage of variation in Y explained by the explanatory variables (X2. X3, ...) jointly is given by a. ? b. R2 с. R d. R heWhat is meant by dummy variable and how dummy variables are constructed?Fiting a straight ine to a set of data yields the following predicion line. Complete (a) through (e) below a. Interpret the meaning of the Yintercept, Choose the correct anower below O A. The Yintercept, be =4, imples that the average value of Yis 4. OB. The Yintercept, b7, implies that when the value of Xs0, the mean value of Yis 7 OC. The Yantercept, by4, implies that tor each increase of 1 unt in X, the value ofYa expected to increase by 4 unts •D. The Yintercept, 4, implies that when the value of Xis 0, the mean value of Y is 4 b. Interpret the meaning of the slope, b Choose the comect answer below OA The slope, by4, implies that for each increase of 1 unit in X, the value of Yis expected to increase by 4 units OB. The slope, by =7, implies that the average value of Y is 7. O C. The slope, b,=7, imples that for each increase of 1 unit in X, the value of Y is expected to increase by 7 units %3D OD. The slope, b,7, implies that for each increase of 1 unit in X, the value of Yis…
- 10. The measure of proportion or percentage of variation in Y explained by the explanatory variables (X,. X3, ...) jointly is given by а. р b. R? с. R d. R heBased on some careful market analysis you have hypothesised that the demand for breakfast cereal can be modeled as where Y is the monthly consumption of cereal for a family of four, X1 is the price of cereal per Kg.X2 is the family income and X3 is the price of eggs per dozen. You have arandom sample of 200 families which contains measurements of the variable for each family. Explain how you wuld determine the effect of the price of eggs on the sales of breakfast cereal given the effects of family income and the price of breakfast cereal given the effects of family income and the price of breakfast cereal.13. The government wishes to model the number of calls made to a particular citizen's advice helpline. Over the last month they estimate that there have been on average 1.8 calls/hour. What distribution would be best to model this random variable? O Normal Distribution O Poisson Distribution O Binomial Distribution O Uniform Distribution O T-Distribution
- True/ false (6-8) 6. Two variables that have a positive correlation move in the same direction. True/ False 7. The concept of slope can be used to answer questions about how much one variable responds to changes in another variable. True/ False 8. The slope of a line is equal to the change in the x-variable divided by the change in the y-variable. Trie/ False hp & 7 8 9. 5.Can you help me examin the relationship betwen both graphs1- the locus of conditional means of Y fort he fixed values of X is the. Please select one; a) intercept line b) linear regression line c) population regression line d) conditional expectation function m
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