Exam 3: Numerical Descriptive Measures

The covariance between the returns on two assets is negative.This occurs when ______________________________________________________________________________________.

Geometric mean is greater than the arithmetic mean.

Consider a population with data values of 12 8 28 22 12 30 14. The mode is ____.

Suppose the wait to passthrough immigration at JFK Airport in New York is thought to be bell-shaped and symmetrical with a mean of 22 minutes.It is known that 68% of travelers will spend between 16 and 28 minutes waiting to pass through immigration.The standard deviation for the wait time through immigration is _________.

Consider a population with data values of 12 8 28 22 12 30 14. The population variance is the closest to ______.

The following data represent the wait time,in minutes,for customers calling Dell technical support. 14 21 37 24 19 12 16 69 13 The interquartile range is _________.

A luxury apartment complex in South Beach Miami is for sale.The owner has received the following offers in millions of dollars. 64 72 66 58 78 82 a.What is the mean offer price?What is the median offer price? Is the mean a good measure of central location? b.What is the sample standard deviation of the offers? c.What is equivalent to a 75^th percentile offer?

The following is a list of GPA ranges and frequencies from a high school.Use 1.5 as the midpoint of the 2.0 or less category. a.What is the mean GPA? b.What is the sample standard deviation of the GPA c.Assuming the distribution is bell shaped what percentage of the students would have GPA's between 1.5 and 3.9? Does this make sense given what you know about GPA's?

Total revenue for Apple Computers(in millions)was $42,905 in 2009,$65,225 in 2010,and $108,249 in 2011.The average growth rate of revenue during these three years is the closest to _______.

A college professor collected data on the number of hours spent by his 100 students over the weekend to prepare for Monday's Business Statistics exam.He processed the data by Excel and the following incomplete output is available. The coefficient of variation in the data is ______.

When applicable,the empirical rule provides the approximate percentage of observations that fall within

The range is defined as ____________.

Which of the following statements is most accurate when defining percentiles?

Amounts spent by a sample of 200 customers at a retail store are summarized in the following relative frequency distribution. The median amount will fall in the following class interval ____________.

The variance is an average squared deviation from the mean.

The following table summarizes selected statistics for two portfolios for a 10-year period ending in 2006.Assume that the risk-free rate is 4% over this period. As measured by the Sharpe ratio,the fund with the superior risk-adjusted performance during this period is _________________________________________________________.

The following data represent the wait time,in minutes,for customers calling Dell technical support. 14 21 37 24 19 12 16 69 13 The upper limit for determining outliers for a box-and-whicker plot is _________.

An investor bought common stock of Blackstone Company on several occasions at the following prices.The following frequency distribution represents the number of hours studied per week by a sample of 50 students. The average price per share at which the investor bought these shares of common stock was the closest to _____.

The following gives summary measures for Google and Apple for 2005-2010. a.Which fund had the higher arithmetic average return? b.Which fund was riskier over this time period? c.Given a risk-free rate of 1%,which fund has the higher Sharpe ratio?What does this imply?

Consider a population with data values of 12 8 28 22 12 30 14. The population standard deviation is the closest to _____.