Judgmental forecasts have the following strengths, except Can compensate for "one-time" or unusual events O b. Can include "inside" and "soft" information difficult to quantify O c. Highly responsive to latest changes in environment O d. Difficulty in understanding causal relationships
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- Explain the difference in how VAR Models are used in performing forecasting and how they are used in structrual inferencing.Give 2 examples of Measures of central tendency to ungrouped data and how to solve itA member of your research team is torn between using inferential or descriptive statistics to determine whether young girls have a lower level of education than young boys in Burkina Faso. Advise the researcher using examples to support your view.
- A researcher conducts a cross-sectional analysis of workers and finds a positive correlation between the number of hours high schoolers spent practicing a musical instrument and their subsequent college performance. Explain how this relationship could be causal. The researcher advocates a policy of requiring all students to take band in order to improve future outcomes. What is a possible problem with this analysis?Give 2 examples of Mode in Measure of central tendency to ungrouped dataExplain Multiperiod Forecasts? what are the methods for making multiperiod forecasts?
- Many small restaurants in Portland, Oregon, and other cities across the United States do not take reservations. Owners say that with smaller capacity, noshows are costly, and they would rather have their staff focused on customer service rather than maintaining a reservation system (pressherald.com). However, it is important to be able to give reasonable estimates of waiting time when customers arrive and put their name on the waiting list. The file RestaurantLine contains 10 observations of number of people in line ahead of a customer (independent variable x) and actual waiting time (dependent variable y). The estimated regression equation is: y=4.35+8.81x and MSE=94.4236.Many small restaurants in Portland, Oregon, and other cities across the United States do not take reservations. Owners say that with smaller capacity, noshows are costly, and they would rather have their staff focused on customer service rather than maintaining a reservation system (pressherald.com). However, it is important to be able to give reasonable estimates of waiting time when customers arrive and put their name on the waiting list. The file RestaurantLine contains 10 observations of number of people in line ahead of a customer (independent variable x ) and actual waiting time (dependent variable y ). The estimated regression equation is: Y=7.82+8.84x and MSE= 113.9197. Number of Customers Waiting Time (Minutes) 4 58 3 38 5 37 4 45 7 73 5 42 8 83 4 54 7 70 4 29 a. Develop a point estimate for a customer who arrive with three people on the wait-list (to decimal). _______minutes b. Develop a confidence interval for the mean waiting time for a…Many small restaurants in Portland, Oregon, and other cities across the United States do not take reservations. Owners say that with smaller capacity, noshows are costly, and they would rather have their staff focused on customer service rather than maintaining a reservation system (pressherald.com). However, it is important to be able to give reasonable estimates of waiting time when customers arrive and put their name on the waiting list. The file RestaurantLine contains 10 observations of number of people in line ahead of a customer (independent variable x) and actual waiting time (dependent variable y). The estimated regression equation is: y=7.82+8.84x and MSE=113.9197. 3 people are on the waitlist.
- Nature lovers’ association of Australia, launched a campaign to encourage paper less communication and/or recycling of used papers to save the trees to reduce global warming. Hence, many small businesses have scaled up their business such as new forms of online document exchanges and collecting used papers and cardboards from households and companies. Abita Recycling Ltd is one such company which is operates in Melbourne. The financial analysist of the company has estimated that the firm would make a profit if the mean weekly collection of papers and cardboards from each household exceeded 1KG. To examine the feasibility of a recycling plant, a random sample of 100 households was selected and sample mean and standard deviations are 1.1KG and 0.35KG respectively. find value of test statistics and null and alternate hypothesis.The Transportation Security Administration (TSA) collects data on wait time at each of its airport security checkpoints. For flights departing from Terminal 3 at John F. Kennedy International Airport (JFK) between 3:00 and 4:00 PM on Wednesday, the mean wait time is 12 minutes, and the maximum wait time is 16 minutes. [Source: Transportation Security Administration, summary statistics based on historical data collected between February 18, 2008, and March 17, 2008.]The article "Americans are 'Getting the Wrong Idea' on Alcohol and Health"† reported that observational studies in recent years that have concluded that moderate drinking is associated with a reduction in the risk of heart disease may be misleading. The article refers to a study conducted by the Centers for Disease Control and Prevention that showed that moderate drinkers, as a group, tended to be better educated, wealthier, and more active than nondrinkers. Explain why the existence of these potentially confounding variables prevents drawing the conclusion that moderate drinking is the cause of reduced risk of heart disease. (Select all that apply.) Someone who is more active is more likely to avoid healthier food. Someone who is wealthier is more likely to purchase healthier food. Someone who is more active is more likely to seek out healthier food. Someone who is educated is more likely to seek out healthier food. Someone who is educated is more likely to not be aware of what…