A researcher believes 47.5% of people who grew up as only child have IQover 100 however unknown to researcher this figure is actually 50% which is the same as in the general population. To attempt to find evidence for the claim the researcher is going to take random example of 400 Let p be people with IQ over 100. Find mean if ^p Find standard dev of ^p Compute app for p(^p >_ 0.475) which is the prob that there will be 47.5% or more people with IQ over 100 is sample