Question

A researcher wants to assess the mean monthly cell phone bill for one household was less than $99. Determine which statement is true regarding errors. If a sample evidence leads the researcher to believe that the mean monthly cost was not less than $99 when, in fact, the mean monthly cost was less than $99, then type I error is made. If a sample evidence leads the researcher to believe that the mean monthly cost was less than $99 when, in fact, the mean monthly cost was not less than $99, then type I error is made. If a sample evidence leads the researcher to believe that the mean monthly cost was less than $99 when, in fact, the mean monthly cost was not less than $99, then type Il error is made. If a sample evidence leads the researcher to believe that the mean monthly cost was not less than $99 when, in fact, the mean monthly cost was not less than $99, then type Il error is made.

Answer 1

From the given information,

Type I error is reject null hypothesis when it is actually true.

Hence, Second option is correct.

Thank you.