2.12 b. 1.734 c. -1.740 d. 1.740 ANSWER: d -same process but now go to one tailed α=0.05 and dof = 17 4. Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (lower tail), a sample size of 10 at a .10 level of significance; t = a. 1.383 b.
Week 1 Quiz (Chapters 1 & 2) Return to Assessment List Part 1 of 1 - | 100.0 Points | Question 1 of 10 | 10.0 Points | The branch of economics that examines the impact of choices on aggregates in the economy is: | | A.positive economics. | | | B.normative economics. | | | C.macroeconomics. | | | D.microeconomics. | | Answer Key: C | | | Question 2 of 10 | 10.0 Points | When we are forced to make choices we are facing the concept of: | | A.ceteris paribus.
Answer: True Difficulty: Medium (REF) 9. The reason sample variance has a divisor of n-1 rather than n is that it makes the variance an unbiased estimate of the population variance. Answer: True Difficulty: Hard 10. The standard deviation of all possible sample proportions increases as the sample size increases. Answer: False
Question 1: Score 0/1 Your response Correct response P16-37 Find Missing Data for Profit Variance Analysis (L. O.4) Find the values of the missing items. Assume that the actual sales volume equals actual production volume. (There are no inventory level changes.) (Input all amounts as positive values. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance).
There is only a 1.28% chance that b = 0, which is better than the 10 percent level required by the marketing director. d. The exact level of significance of is 0.0927. There is a 9.27% chance that rivals’ spending on advertising does not affect Vanguard’s sales (i.e., b = 0), which is just barely better than the 10 percent level required by the marketing director. e. About 78 percent of the variation in sales remains unexplained. Find additional explanatory variables that have a significant affect on S. The manager might try adding the price of its detergent and the
Are there asset classes that should be excluded or others that should be included? 9. Why might standard deviation NOT capture the risks of all asset classes? 10. Using the data from attachments 10-11 (provided below), compute the optimal portfolio allocations if the portfolio mean return objective is 6.4% with some constraints (all weights sum to 100%, weights on cash >= -50% and weights on all other asset classes >=0) and the investor wishes to minimize standard deviation.
© 2007 Mtfernandes Creative Commons Attribution-Share Alike 3.0 Unported, and Creative Commons Attribution-Share Alike 2.5 Generic license The supply and demand curves reflect the availability and cost of a new gaming system. If the gaming system market is currently at Demand and Supply 1, which change to the graph would have to occur to decrease equilibrium price while raising equilibrium quantity? Add Demand 1 to left of Demand. Add Demand 1 to right of Demand. Add Supply 2 to left of Supply 1.
If you choose 40 random employees from the corporation, the standard error would equal 6/Square root of 40 = .95 days. The 12 days in this department corresponds to (12-8.2)/.95 = 4 standard errors above the corporation average of 8.2. This is much higher than two or three standard errors, and it appears to be beyond chance variation. Chapter 9 Exercise 3 The p- value tells you how likely it would be to get results at least as extreme as this if there was no difference in the taste and only chance variation was operating. In this problem, p-value of 0.02 means that, if there is no difference in taste, then there is only 2% chance that 70% or more people would declare one drink better than the
Does the sample data provide evidence to conclude that the installation of the traffic light is warranted (using = .10)? Use the hypothesis testing procedure outlined below. a. Formulate the null and alternative hypotheses. b. State the level of significance.