H〗_0 ∶p=0.70, 〖 H〗_a ∶p≠0.70 Sample size (n)= 150 Sample proportion=0.75 α= 0.05 a. Compute the test-statistic.   Determine the critical value and draw the normal curve. Conclusion.

〖 H〗_0 ∶p=0.70,
〖 H〗_a ∶p≠0.70
Sample size (n)= 150
Sample proportion=0.75
α= 0.05

a. Compute the test-statistic.

Determine the critical value and draw the normal curve.

Conclusion.

Exercise C:
A research conducted on a certain company last year showed that 25% of the employees would rather drink coffee than soft drinks during break time. The company has recently decided to give free coffee during break time. In the new research conducted this year, out of the 125 randomly sampled employees 28% said that they would rather drink coffee than soft drinks. At 0.05 level of significance, is there sufficient evidence to suggest that the coffee drinkers have increased since the company has decided to give free coffee during break time?

Exercise D:
Before the Mayweather vs Pacquiao's Fight of the Century, 75 % of the people in Manila said that they preferred boxing over basketball. After the fight, out of the 150 randomly . chosen people in Manila, 105 said they preferred boxing over basketball. Does this indicate that people in Manila are losing interest in boxing? Use 0.05 level of significance.