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C crower 20. × (D Table D ST e what Lo 4'x/WeBworK: Week 6.pdf × (2) Turning: × e cant Find Te x New Tab > d Secure https://webwork.ucalgary. a vebwork2/F2017STAT2 17L01/Stat 217 F2017 Assignment 3/11/?effectiveUser-30020375&user-30020375;&key-gxPxxEs; User Settings Grades (1 point) A nationally representative survey of 1,000 adults ages 18+ was taken October 3-8, 2013. It was conducted in English on land line and cell phones Photos and videos have become an integral part of the online social experience. In a new survey conducted by Pew Research CenterauLUs Intemet Project, more than half of internet users post or share photos or videos online. Our latost data shows: Problems 54% of 1000 adult internet users post original photos or videos online that they themselves have created. We call them creators and their number has grown from 48% of internet users last year Problerm 3 X Problem 5 x Problem 6. Problem 7 Problem 9 Probler1 10 Problem 11 47% of 1000 adult internet users take photos or videos that they have found online and repost them on sites designed for sharing images with many people. We call them curators and their number has grown from 41% of internet users last year Do the chosen samples suggest that the percentage of creators is 3% more then the proportion of curators (based on the most recent information we have)? (a) Formulate the appropriate statistical hypotheses. c. Ho Pcreators ^ Pcunators 0.03 HA PereatorsExplanation / Answer
The statistical software output for this problem is:
Two sample proportion summary hypothesis test:
p1 : proportion of successes for population 1
p2 : proportion of successes for population 2
p1 - p2 : Difference in proportions
H0 : p1 - p2 = 0.03
HA : p1 - p2 > 0.03
Hypothesis test results:
Hence,
a) Null and Alternative Hypotheses: Option E is correct.
b) Test statistic = 1.79
c) P - value = 0.037
d) Reject; Greater than
Difference Count1 Total1 Count2 Total2 Sample Diff. Std. Err. Z-Stat P-value p1 - p2 540 1000 470 1000 0.07 0.022359562 1.7889438 0.0368Related Questions
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