How does sample size affect the width of a confidence interval?

We want to show that reaction time in students is greater than 175 milliseconds. What are the correct hypotheses?

Group of answer choices

Ho: 175, Ha: < 175

Ho: 175, Ha: > 175

Ho: P = 175, Ha: P< 175

Ho: P 175, Ha: P > 175

When selecting a significance level, why should we consider the consequences of a type I error?

Why do we say that we "fail to reject" the null instead of saying "accept?"