The director of employee benefits at a midsize company wants…

The director of employee benefits at a midsize company wants to determine the amount spent on health care by the typical hourly worker in the company.  A random sample of 21 workers is selected and the amount they spent on their families’ health care needs during the past year was collected and used to create the graphics below.  The director wishes to determine if the average hourly employee in the company spent less than $400 per year on his or her family’s health care needs.  Would conducting a hypothesis test using the t-distribution be appropriate in this situation?

Use the following situation to answer the next three questio…

Use the following situation to answer the next three questions. A random sample of records of home sales from March 1 to July 1, 2010 from the files maintained by the Charlottesville Board of Realtors gives the Price (in dollars) and Size (in square feet) of 32 homes.  The regression model is as follows: Predicted Price = 47,820 + What price would you predict for a 2,500 square-foot house in this market?

Male players at the high school, college, and professional r…

Male players at the high school, college, and professional ranks use regulation basketballs that weigh on average 22 ounces with a standard deviation of 1 ounce.  Assume that the weights of the basketballs are Normally distributed.  If a regulation basketball is randomly selected, what is the probability that it will weigh exactly 22.5 ounces?  Choose the best answer.