Yes, you still have to check the box. The question is whether someone can claim you as a dependent, not whether they do claim you. You are a dependent of your parent, whether or not you are claimed on your parent's tax return.
Being a dependent could affect the amount of your refund, but if $11,000 of wages on a W-2 is your only income, it will not affect your refund in your particular case. Since you are a dependent, your standard deduction will not be $12,950. It will be $11,400 (your earned income plus $400). But that still leaves you with no taxable income, so you will get a full refund of all the federal income tax that was withheld from your pay (box 2 on your W-2). You do not get a refund of the Social Security and Medicare taxes (boxes 4 and 6).
This also means that your parent might as well claim you, because it will reduce your parent's tax, or increase your parent's refund, and will not reduce your refund.
