Classify the following scenarios as one-sided or two-sided tests. Items Test whe
ID: 3198010 • Letter: C
Question
Classify the following scenarios as one-sided or two-sided tests. Items Test whether incoming students at a business school receive better grades in their classes if they’ve taken an on-line program covering basic material Test whether there is a difference between men’s and women’s usage of a mobile fitness app Test whether the number of listeners of a streaming music service has changed after they changed the user interface Test whether users of a commercial website are less likely to make a purchase if they are required to set up a user account on the site
Explanation / Answer
In all of these measures, a comparison is being made;
1) Test whether incoming students at a business school receive better grades in their classes if they’ve taken an on-line program covering basic material = We are to check if only better grades are scored (since worse grades does not matter). Hence it will be a one sided test
2) Test whether there is a difference between men’s and women’s usage of a mobile fitness app = In this case, men's usage can be far more than women's usage or vice versa. Thus, in this case a two sided test is used
3) est whether the number of listeners of a streaming music service has changed after they changed the user interface = This number of listeners changed could be a substantial increase or a substantial decrease; Hence, a two sided test will be used
4) Test whether users of a commercial website are less likely to make a purchase if they are required to set up a user account on the site= We only have to check if the likelihood has decreased or not (since increase in likelihood case too would fall under a no decrease in likelihood). Thus, a one sided test is used.