Exam 2: Descriptive Statistics: Tabular and Graphical Methods

A ______________ displays the frequency of each group with qualitative data and a _____________ displays the frequency of each group with quantitative data.

When developing a frequency distribution the class (group),intervals should be

Fill in the missing components of the following frequency distribution constructed for a sample size of 50.

Using the following data,what would be the range of the values of the stem in a stem and leaf display?

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

If there are 120 values in a data set,how many classes should be created for a frequency histogram?

A Stem and Leaf display is best used to

The US local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals.The stem-and-leaf plot of the data for one year is below: In developing a histogram of these data,how many classes would be used?

A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph. What is the smallest percent spent on R&D?

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 an Ogive plot

A(n)___________ is a graphical display of categorical data made up of vertical or horizontal bars.

A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph. What is the approximate shape of the distribution of the data?

A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and developed the following stem-and-leaf graph. What would be the class length that would be used in creating a frequency histogram?

The sample cumulative distribution function is non-decreasing.

A scatter plot can be used to identify outliers.

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: What percentage of purchases were Plasma televisions by customers with the smallest credit balances?

All of the following are used to describe quantitative data except the

A flaw possessed by a population or sample unit is _____.

Stem-and-leaf displays and dot plots are useful for detecting outliers.

A stem-and-leaf display is a graphical portrayal of a data set that shows the data set's overall pattern of variation.