In anticipation of buying a new scanner, a student turned to a website that reported the results of surveys of users of the different scanners. A sample of 133 responses was listed showing the ease of use of five different brands. The survey responses

were:

Very easy

Easy

Not easy

Difficult

Very difficult

The responses were assigned numbers from 1 to 5. Can we infer that there are differences in perceived ease of use between the five brands of scanners?