Performing a study on the development of body height, a student randomly measures the height of 30 persons in country a. the results turn out to be: {1.7, 1.6, 1.8, 1.9, 1.75, 1.83, 1.82, 1.65, 1.95, 1.69, 1.82, 1.87, 1.65, 1.54, 1.98, 1.78, 1.69, 1.75, 1.62, 1.64, 1.75, 1.8, 1.65, 1.7, 1.82, 1.62, 1.83, 1.75, 1.7, 1.65}. in the literature, a result is found that 10 years before, the average height of persons in country a was determined to be 1.73 and standard deviation is 0.2 .given that the acceptable threshold for significance is 5%, can this data be used to show that the average height of individuals in country a has increased in the last 10 years? (show your calculations).