A researcher is interested in studying whether a new app can help improve first graders' reading skills. She recruits two first grade classes from a local elementary school: classroom 1 uses the app for 30 minutes each day and classroom 2 does not use the app. She compares their reading ability at the end of the school year and expects reading ability to improve in the group that used the app.

What is the null hypothesis for this scenario? - The new app does not improve first graders' reading skills. Since null indicates that there is no difference in this study.

What is the alternative hypothesis for this scenario?- The new app improves first graders' reading skills. Since alternative suggests there was a change.

Please tell me if I'm correct and explain please! I just want to understand this more.