Ionic 3 update checkbox checked on page load based on server response

Ionic Framework ionic-v3
1

I’m trying to update my checkbox value in ionic 3. But i don’t know how to set value as checked based on server response value.

<ion-item *ngFor="let m of mediumType">
        <ion-label>{{m.name}}</ion-label>
        <ion-checkbox formControlName="medium" (ionChange)="checkMediumValue(m,$event)"></ion-checkbox>
      </ion-item>

checkMediumValue(item:any,event){
  let index;
  if (event.checked === true) {
     this.selectedMid.push(item.id);
    }
    else
    {
      index = this.selectedMid.indexOf(item.id);
      this.selectedMid.splice(index, 1);
  }
}

this.ionicForm.controls['medium'].setValue(result.data.medium);