Explore BrainMass
Share

Webcredible

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

Webcredible, a UK-based consulting firm specializing in websites, intranets, mobile devices, and applications, conducted a survey of 1,132 mobile phone users between February and April 2009. The survey found that 52% of mobile phone users are now using the mobile Internet. (Data extracted from "Email and Social Networking Most Popular Mobile Internet Activities"). The authors of the article imply that the survey proves that more than half of all mobile phone users are now using the mobile Internet.

a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to try to prove that more than half of all mobile phone users are now using the mobile Internet.

b. Based on your result in (a), is the claim implied by the authors valid?

c. Suppose the survey found that 53% of mobile phone users are now using the mobile Internet. Repeat parts (a) and (b).

d. Compare the results of (b) and (c).

© BrainMass Inc. brainmass.com October 25, 2018, 8:27 am ad1c9bdddf
https://brainmass.com/statistics/hypothesis-testing/webcredible-540782

Solution Preview

a. step 1: the research claim is more than half of all mobile phone users are using the mobile internet.
step 2: Ho: p=0.50
Ha: p>0.50
step 3: This is a one tailed z test.
test value z = (0.52-0.50)/sqrt(0.50*0.50/1132) = 1.35
step 4: P ...

Solution Summary

The solution discusses a UK-based consulting firm specializing in websites, intranets, mobile devices and applications, Webcredible.

$2.19
See Also This Related BrainMass Solution

Database - Privacy - Internet

I need assistance in preparing an essay of 600 words with referencing please.

Problem details: There is much concern about a person's privacy as the Internet captures increasingly more information about users. The CEO of Sun recently was quoted as saying, "Privacy? You have lost it now get over it!" (or there's a saying "On the Internet, nobody knows you are a dog" ) What techniques do web sites utilize to identify web surfers? How can their databases have entity integrity?

View Full Posting Details