A catalog sales company promises to deliver orders placed on the internet within 3 days. follow-up calls to a few randomly selected customers show that a 90% confidence interval for the proportion of all orders that arrive on time is 88%plus or minus5%. what does this mean? are the conclusions below correct? explain. a right parenthesis between 83% and 93% of all orders arrive on time. b right parenthesis 90% of all random samples of customers will show that 88% of orders arrive on time. c right parenthesis 90% of all random samples of customers will show that 83% to 93% of orders arrive on time. d right parenthesis the company is 90% sure that between 83% and 93% of the orders placed by the customers in this sample arrived on time. e right parenthesis on 90% of the days, between 83% and 93% of the orders will arrive on time.

One investigating company tracked all credit card purchase during 2012 and measured two variables: (1) the type of credit card used (visa, mastercard, american express, or discover), and (2) the amount (in dollars) of each purchase. identify the level of each variable measured.

In its 2016 annual report, caterpillar inc. reported the following (in millions): 2016 2015 sales $38,537 $47,011 cost of goods sold 28,309 33,546 as a percentage of sales, did caterpillar's gross profit increase or decrease during 2016? select one: a. gross profit increased from 26.8% to 28.6% b. gross profit decreased from 28.6% to 26.5% c. gross profit increased from 71.4% to 73.2% d. gross profit decreased from 73.2% to 71.4% e. there is not enough information to answer the question.

Insurance companies have internal controls in place to protect assets, monitor the accuracy of accounting records and encourage operational efficiencies and adherence to policies. these internal controls are generally of two types: administrative controls and accounting controls. administrative controls are the policies and procedures that guide the daily actions of employees. accounting controls are the policies and procedures that delineate authorizations of financial transactions that are done, safeguard assets, and provide reports on the company’s financial status in a reliable and timely manner. internal controls should include both preventative and detective controls. the purpose of preventative controls is to stop problems and errors before they occur. detective controls identify problems after they have occurred. preventative controls are usually more effective at reducing problems, but they also tend to be more expensive. internal controls must be flexible to adjust for changes in laws and regulations in addition to adding new products or modifying current ones. companies must also do regular analyses to ensure that the benefits of implementing the controls are worth their costs. when concerned about paying unwarranted insurance claims which type of control would be useful?