Exam 2: Descriptive Statistics: Tabular and Graphical Methods

When looking at the shape of the distribution using a stem-and-leaf,a distribution is skewed to the right when the left tail is shorter than the right tail.

The number of measurements falling within a class interval is called the _____.

The local electronics retailer has recently conducted a study on purchasers of large screen televisions.The study recorded the type of television and the credit account balance of the customer at the time of purchase.The following results were obtained: Construct a table of column percentages.

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 How many classes should be used in the construction of a histogram?

822 customers were randomly selected from those who had recently bought a book over the internet.The chart below shows the breakdown of the classification of the book type: What percentage of the books purchased were self-help books?

A frequency table includes row and column percentages.

Math test anxiety can be found throughout the general population.A study of 116 seniors at a local high school was conducted.The following table was produced from the data.Complete the missing parts.

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained: Construct a table of row percentages

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained: Construct a table of column percentages

The following is a partial relative frequency distribution of grades in an introductory statistics course. Find the relative frequency for B grade

A relative frequency curve having a long tail to the right is said to be _____.

A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below: What is the midpoint of the third class interval?

The following is a relative frequency distribution of grades in an introductory statistics course. If we wish to depict these data using a pie chart,find how many degrees (out of 360 degrees)should be assigned to each grade.

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained: What percentage of those surveyed could not correctly recall the company?

An observation separated from the rest of the data is a(n)

A ______________ can be used to differentiate the "vital few" causes of quality problems from the "trivial many" causes of quality problems.

The local electronics retailer has recently conducted a study on purchasers of large screen televisions.The study recorded the type of television and the credit account balance of the customer at the time of purchase.The following results were obtained: Construct a table of row percentages.

The following is a relative frequency distribution of grades in an introductory statistics course. If this was the distribution of 200 students,find the frequency for the highest two grades:

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 What is the shape of the distribution of the data?

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 Construct a stem-and-leaf plot.