A popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of $30 and a standard deviation of $9. What is the probability that a randomly selected customer will spend between $20 and $35 at this store? Place your answer, rounded to 4 decimal places, in the blank. For example, 0.3456 would be a legitimate entry.

Draw a data model for the following:

A travel agency is frequently asked questions about tourist destinations. For example, customers want to know details of the climate for a particular month, the population of the city, and other geographic facts. Sometimes they request the flying time and distance between two cities. The manager has asked you to create a database to maintain these facts.

2. You manage a farm that is looking to sell oranges in both California and Oregon. The demand for oranges in California is given by P^CA = 25 - 0.5Q_^CA and the demand for oranges in Oregon is P^OR = 19 - 0.3Q^OR. The total cost of selling oranges is TC = 10 + Q and the marginal cost is constant at MC = $1. If you can differentiate between customers in California and Oregon, you should charge a price of $312 in California and a price of $300 in Oregon.

3. You manage a farm that is looking to sell oranges in both California and Oregon. The demand for oranges in California is given by P^CA = 25 - 0.5Q_^CA and the demand for oranges in Oregon is P^OR = 19 - 0.3Q^OR. The total cost of selling oranges is TC = 10 + Q and the marginal cost is constant at MC = $1. If you cannot differentiate between customers in California and Oregon, and you are forced to charge the price that is optimal in California in both Oregon and California, how much profit will you lose compared to the profit you made in (2).

A magazine uses a survey of readers to obtain customer satisfaction ratings for the nation's largest retailers. Each survey respondent is asked to rate a specified retailer in terms of six factors: quality of products, selection, value, checkout efficiency, service, and store layout. An overall satisfaction score summarizes the rating for each respondent with 100 meaning the respondent is completely satisfied in terms of all six factors. Sample data representative of independent samples of Retailer A and Retailer B customers are shown below.

Formulate the null and alternative hypotheses to test whether there is a difference between the population mean customer satisfaction scores for the two retailers. (Let μ₁ = population mean satisfaction score for Retailer A customers and μ₂ = population mean satisfaction score for Retailer B customers.)

(b) Assume that experience with the satisfaction rating scale of the magazine indicates that a population standard deviation of 11 is a reasonable assumption for both retailers. Conduct the hypothesis test.

Find the value of the test statistic. (Round your answer to two decimal places.) =

Find the p-value. (Round your answer to four decimal places.)

p-value = .

(c)

Provide a 95% confidence interval for the difference between the population mean customer satisfaction scores for the two retailers. (Round your answers to two decimal places.)

_______ to ______

Which retailer, if either, appears to have the greater customer satisfaction?

The manager of a pizza restaurant has recently begun experimenting with a new method of baking pepperoni pizzas. He personally believes that the new method produces a better-tasting pizza, but he would like to base the decision on whether to switch from the old method to the new method on customer reactions. Therefore, he performed an experiment. For 100 randomly selected customers who order a pepperoni pizza for home delivery, he included both an old-style and free new-style pizza in the order. All he asked is that the customers rate the difference between pizzas on a –10 to +10 scale, where –10 means they strongly favor the old style, +10 means they strongly favor the new style, and 0 means they are indifferent between the two styles.

A. what is the business decision to make in this case?

B. once the manager gets the ratings from the customers, how should he make his decision? do you think hypothesis testing is the pest procedure to be used in this business decision making context?

C. if hypothesis testing is used, what will be the null and alternative hypothesis? what does accepting the null hypothesis mean in this case?

D. explain Type 1 and Type 2 errors that the manager may commit when making the decision. what he should do to avoid committing Type 1 error?

A branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 pm lunch period. Management decides to first study the waiting time in the current process. The waiting time is defined as the number of minutes that elapses from when the customer enters the line to when he or she reaches the teller window. Data are collected from a random sample of 15 customers. Suppose a competitor's branch located in a residential area is also concerned with the same business objective. Data are collected from a random sample of 15 customers.

1a. Is there evidence of a difference in the variability of the waiting time between the two branches (use α = 0.05)?

1b. Identify the appropriate test to use, explain why you use that test, and interpret your results.

2a. Is there any evidence of a difference in the mean waiting time between the two branches?

2b. Identify the appropriate test to use, explain why you use that test, and interpret your results.

Please show your work in excel using the Data Analysis function.

1. Discuss the role genetics plays in the development of bipolar 2 disorders.  
2. Explain how the hypothalamic-pituitary-adrenal (HPA) system may be associated with bipolar type 2 disease.
3. Discuss the role inflammatory cytokines play in the development and exacerbation of bipolar type 2 symptoms
4. Discuss the role of the amygdala in bipolar disorder.
5. How does neurochemical dysregulation contribute to bipolar disorders?
6. What is the status of the use of nutraceuticals in management of depression?
7. What are pnictogens and how do they contribute to the development of panic attack symptoms?
8. How does the GABA-benzodiazepine (BZ) receptor systems contribute to panic attacks/disorders?
9. Describe the areas of the brain that are associated with social anxiety disorder.
10. How is oxytocin associated with anxiety disorder (SAD)?
11. Discuss the role of neurotransmitters in the expression of generalized anxiety disorder (GAD).  
12. Explain the structural brain changes that occur in people with GAD.
13. Describe the changes seen in the brain structure in patients with PTSD.
14. Briefly discuss the role glucocorticoids may have on the development of PTSD.
15. What is primary pathophysiology of obsessive-compulsive disorder (OCD?
16. Describe the role the dorsal anterior cingulate cortex (dACC) has in reinforcement of obsessive behaviors.

You have just turned 25 years old, and accepted a job offer. Now you must decide how much money to put into your retirement plan. The plan works as follows: Every dollar in the plan earns 8% per year. You cannot make withdrawals until you retire on your 60 th birthday. After that, you can make withdrawals as you see fit. You estimate that to live comfortably in retirement, you will need $80,000 per year, starting at the end of the first year of retirement and ending on your 100th birthday.

a. How much saving on your 60th birthday so that you can afford to spend $80,000 per year till you are 100?

b. If you contribute the same amount to the plan at the end of every year that you work, how much do you need to contribute each year to fund you retirement?

c. If you can save 2% more per year until you retire, how much do you need to contribute the first year to fund your retirement?