A researcher believes that 48.5% of people who grew up as the only child have an IQ score over 100 . However, unknown to the researcher, this figure is actually 50%, which is the same as in the general population. To attempt to find evidence for the daim, the researcher is going to take a fandom sample of 400 people who grew up as the only child. Let p^ be the proportion of people in the sample with an tQ score above 100. Answer the following. (If nece-ssary, consult a list of formulas.)