A researcher wants to test the hypothesis that childhood exposure to advertising exceeds 115 ads per day. Originally theyr intended to use a [MD significance level, out then changed it to D115. As a result... 0 the rejection region will become smaller 0 there is no relation between the size of the rejection region and the significance level O the rejection region may become larger or smaller 0 the rejection region will become larger 0 the rejection region will not change A ten year old study concluded that children are exposed to 120 ads daily, on average. A researcher claims that this value has changed from the value it was 10 years ago. The null hypothesis Ho can be expressed as: Ou 10 O none of the aboveA hypothesis can be a claim or a statement about a... O Population mean Sample standard deviation O Sample mean O Level of significance O Critical value