In: Statistics and Probability
Three products compete in the same market. In 2019, market
shares were distributed as follows: Product A: 50% Product B: 15%
Product C: 35%
1000 people were asked which of the three products would buy today.
The answers were distributed as follows: Company A:480 Company
B:120 Company C:400
Use an appropriate hypothesis test to test if the distribution
today is significantly different from the distribution in 2019. Use
a 5% significance level.