Question

You notice that the type of phone someone has and the computer operating system they use seems to be related. To determine if Phone and Computer OS are dependent, what are the appropriate hypotheses?

Question 1 options:

	1) HO: Phone and Computer OS are related to one another. HA: Phone and Computer OS are independent of each other.
	2) HO: Phone and Computer OS are independent of one another. HA: Phone and Computer OS are associated with each other.
	3) HO: Phone and Computer OS are independent of one another. HA: Phone and Computer OS display a negative correlation.
	4) HO: Phone and Computer OS are independent of each other. HA: Phone and Computer OS display a positive correlation.
	5) There is no correct set hypotheses given.

Question 2 (1 point)

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Suppose Best Buy would like to know if the age of a customer affects the brand of digital camera he or she purchases to help design a new promotional campaign. The data will show the frequency with which people, categorized by their age groups, purchased various camera brands. To determine if Camera Brand and Age Group are dependent, what are the appropriate hypotheses?

Question 2 options:

	1) HO: Camera Brand and Age Group are dependent on each other. HA: Camera Brand and Age Group are not related to each other.
	2) There is no correct set hypotheses given.
	3) HO: Camera Brand and Age Group are independent of each other. HA: Camera Brand and Age Group display a negative correlation.
	4) HO: Camera Brand and Age Group are independent of each other. HA: Camera Brand and Age Group display a positive correlation.
	5) HO: Camera Brand and Age Group are not related to one another. HA: Camera Brand and Age Group are associated with each other.

Question 3 (1 point)

A marketing research firm wanted to determine whether an individual's favored Age Group and Social Network were related. For age they grouped by 18-34, 35-55, and 55+ and the social networks they investigated were Facebook, Google+, and Twitter. The table below presents their findings. To test at the 0.01 level to determine if Age Group and Social Network are dependent, calculate the chi-square test statistic and p-value.

Question 3 options:

	1) 6.884, the degrees of freedom is 4, and the p-value is 0.1422.
	2) 8.22, the degrees of freedom is 4, and the p-value is 0.8578.
	3) None of the other options are fully correct.
	4) 6.884, the degrees of freedom is 9, and the p-value is 0.6492.
	5) 6.884, the degrees of freedom is 4, and the p-value is 0.0100.

Answer 1

#1.
Option (2)

HO: Phone and Computer OS are independent of one another.

HA: Phone and Computer OS are associated with each other.

#2.
Option (5)

HO: Camera Brand and Age Group are not related to one another.
HA: Camera Brand and Age Group are associated with each other.

#3.
Option (1)

6.884, the degrees of freedom is 4, and the p-value is 0.1422.