Business Analytics
Showing posts with label Business Analytics. Show all posts
Showing posts with label Business Analytics. Show all posts

When some group is chosen because it is a group the researcher has access to, it is called a ___________________ and it is ________________ to represent the population well.

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When some group is chosen because it is a group the researcher has access to, it is called a ___________________ and it is ________________ to represent the population well.



a. voluntary response bias; likely
b. involuntary response bias; not likely
c. nonresponse bias; likely
d. convenience sample; not likely
e. double blind bias; likely


Answer: d. convenience sample; not likely

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 Farming 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. Which is the sampling frame? population? population parameter? sample?

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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 Farming 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. Which is the sampling frame? population? population parameter? sample?



a. an alphabetized list of 5000 members of Northeast Organic Farming Association
b. all farmers
c. the proportion of organic farmers who are concerned about climate change affecting their crop yields
d. 150 of the 5000 members of Northeast Organic Farming Association who are contacted


Answer:


a. an alphabetized list of 5000 members of Northeast Organic Farming Association = sample frame
b. all farmers = population
c. the proportion of organic farmers who are concerned about climate change affecting their crop yields = population parameter
d. 150 of the 5000 members of Northeast Organic Farming Association who are contacted = sample

South Park International Airways wants to check on customer satisfaction with ticket prices and fees. As a large airline, it has over 1800 flights a day from fifteen different airports. Their in-house researchers, Kyle and Stan, randomly choose thirty flights (two departing flights from each airport) and survey all the passengers on those flights concerning their satisfaction, giving them a snack and beverage voucher which can be redeemed immediately upon turning in the survey. The researchers are ecstatic to note a ninety-seven percent survey completion rate. What type of sample is this?

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South Park International Airways wants to check on customer satisfaction with ticket prices and fees. As a large airline, it has over 1800 flights a day from fifteen different airports. Their in-house researchers, Kyle and Stan, randomly choose thirty flights (two departing flights from each airport) and survey all the passengers on those flights concerning their satisfaction, giving them a snack and beverage voucher which can be redeemed immediately upon turning in the survey. The researchers are ecstatic to note a ninety-seven percent survey completion rate. What type of sample is this?



a. simple random
b. stratified random
c. cluster random
d. multistage random


Answer: d. multistage random

The Creative Design consulting group is reviewing a study designed to test a new presentation format on a website. In a basic required class of students enrolled in web design, they randomly assign half the class to the old format treatment and the other half to the new format. This illustrates a(n):

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The Creative Design consulting group is reviewing a study designed to test a new presentation format on a website. In a basic required class of students enrolled in web design, they randomly assign half the class to the old format treatment and the other half to the new format. This illustrates a(n):



a. survey
b. observation
c. experiment
d. presentation


Answer: c. experiment

Kenny is testing the tensile strength of experimental titanium sponge hair curlers for the Southpark Manufacture and Supply Company. He is comparing two chemical procedures used to increase the strength of the sponge curlers (Chemical A and Chemical B). Kenny is crushing each sponge curler in his sample to see how many pounds per square centimeter it withstands before it fails. Each sponge curler can be considered a(n):

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Kenny is testing the tensile strength of experimental titanium sponge hair curlers for the Southpark Manufacture and Supply Company. He is comparing two chemical procedures used to increase the strength of the sponge curlers (Chemical A and Chemical B). Kenny is crushing each sponge curler in his sample to see how many pounds per square centimeter it withstands before it fails. Each sponge curler can be considered a(n):



a. experimental unit
b. subject
c. participant
d. supply or resource



Answer:

a. experimental unit - inanimate object in experiment
b. subject - person in an experiment
c. participant - voluntary person in a survey


While shopping on the Your Tunes website, you note that after looking at the details of a particular item, pictures of other items appear at the bottom with the note that other shoppers who bought the particular item you research often purchased the pictured items. This particular target marketing for online shoppers is a product of:

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While shopping on the Your Tunes website, you note that after looking at the details of a particular item, pictures of other items appear at the bottom with the note that other shoppers who bought the particular item you research often purchased the pictured items. This particular target marketing for online shoppers is a product of:



a. meta-analysis of meta-data of consumer behavior
b. regional analytics
c. relational database
d. social psychological research


Answer: c. relational database

Given the population data set (113, 115, 117, 119, 127, 129) what is the variance? 35.66667 "u" is the symbol for

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Given the population data set (113, 115, 117, 119, 127, 129) what is the variance? 35.66667
"u" is the symbol for



a. population mean
b. sample mean
c. population variance
d. population standard deviation
e. sample standard deviation


Answer:


a. population mean: u
b. sample mean: (xbar)
c. population variance: o^2
d. population SD: o
e. sample SD: s

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