data = [{name:'xyz', value:'0', checked:false},
{name:'abc', value:'1', checked:false},
{name:'def', value:'2', checked:false}];

<ul style="list-style-type: none">
            <li *ngFor="let option of data">
                <label>
                    <input type="checkbox" (click)="clicked($event)"
                    name="options"
                        value="{{option.value}}"
                        [(ngModel)]="option.checked" />
                            {{option.name}}
                </label>
            </li>
</ul>

clicked(event:any){

    console.log(this. data);
    for(var i=0;i<this. data.length;i++){
        console.log(this. data[i]);
    }
}

0:{name: "xyz", value: "0", checked: true}
1:{name: "abc", value: "1", checked: false}
2:{name: "def", value: "2", checked: false}

{name: "xyz", value: "0", checked: false}
{name: "abc", value: "1", checked: false}
{name: "def", value: "2", checked: false}