Question

Z hypothesis test

1.Pizza Hut wants to know how friendly consumers perceive the service to be in a certain store. A sample of 225 customers was obtained and asked to indicate their perception of service on a 5-point scale where 1 is very unfriendly and 5 is very friendly service.

Pizza Hut believes service has to be different from 3

• Ho: Mu = 3
• H1: Mu ≠ 3

X-bar=3.78

S=1.5

n=225

Take alpha= .05

Test the hypothesis using Z, conclude, interpret.

Answer 1