Business analytics Unit 2

Make sure to use the Unit 2 Assignment template from Doc Sharing when you turn in your answers.

Using the template is part of your grading rubric.

You should not use Excel or any automated probability calculators for this Assignment. All of the

questions below should be calculated manually using the methodology in the readings.

Question 1

An Adweek Media/Harris Poll revealed that 44% of U.S. adults in the 18–34 year age category think

that “Made in America” ads boost sales. A different Harris Interactive poll showed that 78% of U.S.

adults in the 18–34 year age category use social media online. Suppose that 85% of U.S. adults in

the 18–34 year age category think that “Made in America” ads boost sales or use social media online.

If a U.S. adult in the 18–34 year age category is randomly selected,

a. What is the probability that the person both thinks that “Made in America” ads boost sales and

uses social media online?

b. What is the probability that the person thinks that “Made in America” ads boost sales but do not

use social media online?

Question 2

According to a report by Scarborough Research, the average monthly household cellular phone bill is

$73. Suppose local monthly household cell phone bills are normally distributed with a standard

deviation of $11.35.

a. What is the probability that a randomly selected monthly cell phone bill is less than $100?

b. What is the probability that a randomly selected monthly cell phone bill is between $70 and

$90?

Question 3

A Travel Weekly International Air Transport Association survey asked business travelers about the

purpose for their most recent business trip. Nineteen percent responded that it was for an internal

company visit. Suppose 950 business travelers are randomly selected.

a. What is the probability that more than 25% of the business travelers say that the reason for

their most recent business trip was an internal company visit?

b. What is the probability that between 15% and 20% of the business travelers say that the

reason for their most recent business trip was an internal company visit?

Submit your Assignment to the unit Dropbox.

00Unit 2 Dropbox Assignment Answers by (Insert your name here)

In the summary tables below, insert only the answers. You will show work after the summary section.

Question 1 answers

1a
1b

Question 2 answers

2a
2b

Question 3 answers

3a
3b

Work

Show all your work for the three questions below.

Question 1

Show your work here.

Question 2

Show your work here.

Question 3

Show your work here.