LEARNING OBJECTIVE: Determine the results of a hypothesis test are due to statistical significance or chance. A school authority claims that the average height of students is 178 cm. A researcher has taken a well- designed survey and his sample mean is 177.5 cm and the sample standard deviation is 2.0. The sample size is 30. Which statement is correct? (a.) It is unclear if the result is significant or not. (b.) The study is biased OR the sample size is too small to make a conclusion. (<) The result of the survey is not likely statistically significant ( d.) The result is likely statistically significant