According to a survey carried out by the center facilitating research and innovation in organizations in 2017, among 1,100 Quebec adults, 275 made an online purchase from a mobile device. A similar survey carried out in 2016 among 1010 adults specifies that 215 Quebec adults made an online purchase from a mobile device. Can we say, at the 5% significance level, that the percentage of Quebec adults who have made an online purchase from a mobile device has increased significantly?

1.We reject Ho since the reduced deviation Z= 2.2874 is greater than the critical value of Z, we can affirm, at the significance level of 5%, that the percentage of Quebec adults who have made an online purchase at from a mobile device increased significantly from 2016 to 2017.

2.We do not reject Ho since the reduced deviation Z = 2.2874 is lower than the critical value of Z, we can affirm, at the significance level of 5%, that the percentage of Quebec adults who made a purchase in online from a mobile device did not increase significantly from 2016 to 2017.

3.We reject Ho since the reduced-deviation Z = 2.0177 is greater than the critical value of Z, we can affirm, at the 5% significance level, that the percentage of Quebec adults who have made an online purchase at from a mobile device increased significantly from 2016 to 2017.

4.We do not reject Ho since the reduced-deviation Z = 2.0177 is lower than the critical value Z, we can affirm, at the significance level of 5%, that the percentage of Quebec adults who have made an online purchase from a mobile device did not increase significantly from 2016 to 2017.

5.We reject Ho since the reduced deviation Z= 1.524 is greater than the critical value of Z, we can affirm, at the significance level of 5%, that the percentage of Quebec adults who made an online purchase from obil device increased significantly from 2016 to 2017.