Exam 1: Introduction to Statistics

How much inventory do Christmas tree sales lots keep? A researcher goes from location to location around the city counting the number of trees in each lot.These numbers most likely represent what level of data?

Nominal and ordinal data are sometimes referred to as qualitative data.

You are the owner of a camping site that has a small pond with fishes,and you want to know approximately the number of fishes currently in the pond.For this purpose,you catch 30 fishes and mark them with a special ink that will take a few days to be washed away.The ink doesn't affect the fishes in any way.The fishes are returned promptly to the pond after being marked.The next day at the same time of day you return and catch 30 fishes,and you find out that 5 of these fishes are marked.

You are the owner of a camping site and want to estimate the average age of your customers.For this purpose,you select a representative sample of your clients and offer them a discount good for their next visit as compensation for filling out a short questionnaire that includes relevant age intervals.The average age of your customers is:

Miguel Hernandez,Senior Vice President of Human Resources at Memorial Hospital is exploring the usage of nursing overtime in the emergency department during the last operating year.Staffing records and emergency department visits for 20 days between the period of January 1,2012,and December 31,2012,are selected for analysis. For this study,the group of 20 days is a __________.

Members of the accounting department's clerical staff were asked to rate their supervisor's leadership style as either (1)authoritarian or (2)participatory. This is an example of _______.

Sales of a restaurant (in dollars)are an example of what level of data measurement?

The highest level of data measurement is the ratio level.

Pinky Bauer,Chief Financial Officer of Harrison Haulers,Inc.,suspects irregularities in the payroll system,and orders an inspection of "each and every payroll voucher issued since January 1,2013." Pinky is ordering a __________________.

The social security number of employees would be an example of what level of data measurement?

A market researcher is interested in determining the average income for families in Duval County,Florida.To accomplish this,she takes a random sample of 400 families from the county and uses the data gathered from them to estimate the average income for families of the entire county. This process is an example of _______.

A local manufacturing plant randomly selected 200 items from a production run and 9 of them are defective.The proportion of defective items in this sample is a ________.

Rebecca Sear,Marketing Director of a regional restaurant chain,is directing a study to identify and assess the in-dining experience of the customers at one of the restaurants.She directs her staff to design a web-based market survey for distribution to all of the restaurant's 100 customers who enjoyed a meal during the past 6 months.For this study,the set of 100 customers is ________________.

A variable is a numerical description of each of the possible outcomes of an experiment.

Gathering data from a sample to reach conclusions about the population from which the sample was drawn is called descriptive statistics.

Numbers which are used to rank-order the performance of workers represent data measured at the interval level.

A market research analyst has asked consumers to rate the appearance of a new package on a scale of 1 to 5. A 1 means that the appearance is awful while a 5 means that it is excellent.The measurement level of this data is _______.

A list of final grades in an introductory class in business is an example of statistics

The process of summarizing the data is called

A descriptive measure of the sample is called a statistic.