A media streaming website knows that 70% of its customers primarily
watch on their television, 18% primarily watch on their computer, and
12% primarily watch on a mobile device. The company wonders if these
percentages hold true after a recent update to the product. They take a
random sample of 700 customers and obtain these results:
Device
Television Computer
Mobile
Expected
70%
18%
12%
# of customers
401
197
102
They want to perform a x2 goodness-of-fit test to determine if these
results suggest that the the distribution has changed.
What is the expected count of customers that watch on their computer in
the sample?
You may round your answer to the nearest hundredth.