It is known from past information that the probability of failing to finish an Ironman (called a DNF) is 15%. Suppose we take a sample of 100 Ironman races over the past few years and find that the DNF percentage is 12%. We are interested in seeing if there has been a significant decrease in the number of DNFs. Use alpha=0.05. Find the 95% confidence interval for the percentage of DNFs.

a. (0.0665, 0.1735)

b. (0.0555, 0.1845)

c. (0.1179, 0.1221)

d. (0.0563, 0.1837)

Onsider the following subscription behavior information from genie, a web site that provides tools for constructing a family tree (ancestor search). subscriptions cost $9.99 per month, but you are charged for the entire year at the time of purchase. there is a one-year minimum term when you sign up for the service. once purchased, subscriptions are set to renew automatically unless the subscriber cancels them. when a membership renews, it renews for a one-year term and again you are charged for the entire year. there are no variable costs associated with providing this service to an individual customer, but genie does engage in customer relationship activities that they believe will increase customer retention. these customer relationship activities cost genie about $10 per year per customer. based on a sample of 1000 customers that joined genie five years ago, near the time when the company was founded, they were able to determine how many of those customers remained subscribers in the second year, third year etc. based on this information, genie calculated the average annual retention rate to be 20%. genie uses an annual discount rate of 8%. a. last year, genie spent $10,000 placing advertisements on google. genie management believes that these advertisements were responsible for about 300 new subscribers. would you recommend to genie management that they purchase more google ads? b. suppose a newly-introduced loyalty program increases the number of customers that remained to 30%. does this new data change your answer to 9.a? c. do you have any hesitations or concerns about making recommendations to management based on your above estimate of customer lifetime value?

Specialization—the division of labor—enhances productivity and efficiency by a) allowing workers to take advantage of existing differences in their abilities and skills. b) avoiding the time loss involved in shifting from one production task to another. c) allowing workers to develop skills by working on one, or a limited number, of tasks. d)all of the means identified in the other answers.

crow design, inc. is a web site design and consulting firm. the firm uses a job order costing system in which each client is a different job. crow design assigns direct labor, licensing costs, and travel costs directly to each job. it allocates indirect costs to jobs based on a predetermined overhead allocation rate, computed as a percentage of direct labor costs. direct labor hours (professional) 6,250 hours direct labor costs ($1,800,000 support staff salaries ,000 computer ,000 office ,000 office ,000 in november 2012, crow design served several clients. records for two clients appear here: delicious treats mesilla chocolates direct labor 700 hours 100 hours software licensing $ 4,000 $400 travel costs 8,000 1. compute crow design’s direct labor rate and its predetermined indirect cost allocation rate for 2012. 2. compute the total cost of each job. 3. if simone wants to earn profits equal to 50% of service revenue, how much (what fee) should she charge each of these two clients? 4. why does crow design assign costs to jobs?