Business Analytics Test 1

Given the following sample data set with a mean of 5, the variance of the sample is (3,3,5,7,7)

4

What is the frequency of the marginal distribution of MBA students whose origin is Latin American? Latin American total: 29 Total: 338

8.6 %

If the variance of a sample set with 28 measures, is equal to 81, the standard deviation is equal to

9

If the teacher of the class chooses 5 boys and 5 girls for testing, is this likely a random sample?

No

An environmental advocacy group is interested in the perceptions of farmers about global climate change. Specifically, they wish to determine the percentage of organic farmers who are concerned that climate change will affect their crop yields. They use an alphabetized list of members of the Northeast organic farmer association, a nonprofit organization with over 5000 members in a multitude of states. They randomly select members from this list until they have succeeded in contacting 150 members. What is this sampling frame?

an alphabetized list of the 5000 members of northeast organic farming association

Data is collected from 32 students. Which of the following variables is qualitative?

best emoticon for how you felt while studying for this exam

______ describes any use of statical analysis to drive business decisions from data

business analytics

South park international airways wants to check on costumer satisfaction with ticket prices and fees. As a large airline, it has over 1800 flights a day from 15 different airports. Their in house researchers assume that no airport is really different from any other, and believes that time frame makes little difference. They randomly chose 250 passengers from a list of those with reservations on a given day. Numbers were assigned each passenger, then a random number generator was used to select the 250 sample. Selected passengers were met at check in and given a survey to complete on the plane concerning their satisfaction, giving them a snack and beverage voucher which could be redeemed immediately upon turning in the survey. The researchers are ecstatic to note a 97 % survey completion rate. What type of sample is this?

cluster random

Dr. Jones-Smith has designed a survey of student study habits. He teaches biology with a focus on patient compliance and drug interactions. She has decided to send out a survey to her students since she has the email addresses and can make it an extra credit assignment to ensure a high response rate. While Dr. Jones-Smith may understands patient culture and medications, she suffers in understanding design issues dealing with people. Her design illustrates a/n

convenience sample

According to Hill(2012), how did people react/feel about Target knew about their pregnancies in advance?

creeped out that Target predicted their pregnancy

When data is collected at a single point in time on a number of variables, it can be considered _____ data

cross sectional

The real sample a researcher ends up with for analysis is a result of a. an imperfect sampling frame b. less than 100% response rate c. changing population of interest d. bias introduced by constraints of real world limits e. all of the above

e. all of the above

The online training consulting group is reviewing a study designed to test a new presentation format on its website. In a "free introductory" course, the individuals enrolled are randomly assign half the class to the old format presentation and the other half to the new format presentation. This illustrates a(n)

experiment

According to Bell(2013) what is said to be the number one obstacle when it comes to forming an in house analytics team?

finding one person who can lead a new analytics function, establish an analytics presence, and build an effective team

What is the second rule of data analysis?

make a picture

When some portion of the population does not understand the questions or interprets them differently than intended by the researcher, the design suffers from

measurement error

Suppose large suburban school districts decides to randomly test kindergarten students for attention deficit disorder (ADD). There are twenty schools in the district each with 8 kindergarten classes. The school board randomly chooses only one class from each school in to reduce disruption. From each chosen class, then the researcher randomly chooses 5 boys and girls, since the population is balanced in gender. What type of sample is this?

multistage random

What scale of measure would result if the survey respondents recorded the ranked a list of local eating establishments, 1st, 2nd, 3rd, 4th, etc.

ordinal

_______ have leading questions designed to create the desired survey results for various campaigns, both political and social

push polls

What kind of variable results when a survey participant is asked to indicate their single favorite kind of fast food?

qualitative

The Super smooth southern analytic consultants are planning to do a survey of current interests of 25 to 60 year olds in the greater Auburn Opelika area, which they operationally defined as Lee County. They have gotten a copy of the recent (2010) census and sorted out a mailing list of all individuals in that age range. The list is four hundred pages long, with 33 individuals per page. They randomly select a number between 1 to 33, then choose that number from each page through the entire 400 pages. The method might best be described as

random systematic

_______ is the symbol for standard deviation of a sample

s

Sample to sample differences in the values for the variables which are measured are called

sampling error

The Auburn University Parking Director is studying students' response to the possibility of three parking strategies for all attending or working at Auburn University. Stratified random design for sampling is a real possibility because the organization has a most complete _______ with complete information about the individual's characteristics.

sampling frame

If you looking at two categorical variables together, which of the following is an appropriate graphic?

side by side bar chart

Key values or summary characteristics that are derived from a sample called

statistics

Kyle is testing the physical endurance of applicants for the Southwark Regional Airlines. Kyle gives each applicant a two hour physical ability test. Half of the applicants are randomly assigned to a treatment procedure of relaxing music during the test; the other half of randomly assigned applicants endure a noisy room with construction sounds. This information is not used for employment decisions, but it is a baseline measure which the airline is collecting for future research. Each applicant has the ability and right to refuse the test, but none have. Each applicant can be considered a(n)

subject

The "who" of Ws refers to

the case or cases