Question

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. the sample size is 25.

Answer 1

The difference exists due to chance since the test statistic is small.

Step-by-step explanation: With a very small sample size of 25, a difference of 0.5 cm is most likely due to chance.