Bumble has three different smartphone calculator applications, A, B, and C, and wonders if they differ in usability. To test this, he gathered 900 participants and had each person try one of the three calculator apps, and then asked if the app is easy to use or not easy to use. Of the 300 participants that used Calculator A, 56% reported that the app is easy to use, which compares to 57% of the 300 that used Calculator B and 66% of the remaining 300 that used Calculator C.

Using= 0.05 level of significance, conduct multiple pairwise comparison tests among the three calculators and answer if each of the following pairs has a significant difference in % of ratings.

Between Calculator A and Calculator B:

1.the difference is significant

2.the difference is not significant

3.cannot be determined

Between Calculator A and Calculator C:

1.the difference is significant

2.the difference is not significant

3.cannot be determined

Between Calculator B and Calculator C:

1.the difference is significant

2.the difference is not significant

3.cannot be determined