Nikki has given a memory test to all the kindergarteners of a small Alaskan town. All the children made different scores, so her population frequency distribution was flat. What will this do to her...

Nikki has given a memory test to all the kindergarteners of a small Alaskan town. All the children made different scores, so her population frequency distribution was flat. What will this do to her sampling distribution of means (given that she uses a sample size larger than 30)?