One Sample t-test A study was conducted to investigate whether the age of tourists in Katatonia has increased since 1995. In a random sample of 250 tourists in Katatonia, the average age was 47.77 years (s = 15.41 years). This is higher/lower/ while this is lower than the average age of 45 years recorded in 1995, and one-sample t-test shows that this difference in mean age is significant/not significant, t(249) = 2.84, p = 005. The 95% confidence interval indicates that since 1995 the average age of tourists has increased/decreased between 0.85 and 4.69 years. As expected, the age of tourists in Katatonia has increased since 1995. Contrary to expectations, the age of tourists in Katatonia has decreased since 1995. There is insufficient evidence to conclude that the age of tourists in Katatonia has changed since 1995. Binomial test A study was conducted to explore whether the percentage of Australians using a computer at home has increased since the census in 2001 CHANGE DEPENDING ON QUESTION. In a random sample of 100 adult Australians, 54% had used a computer at home in the previous week. This is higher/lower/whiles this is lower than the percentage of Australians who reported using a computer at home in the 2001 census (42%), and a(take out if WHILE THIS IS LOWER ETC) Binomial test shows that the difference is significant/not significant , n = 100, p = . 010. The 95% confidence interval indicates that between 44% and 64% of adult Australians use a computer at home. As expected, the percentage of Australians using a computer at home has increased since 2001 Contrary to the claims made by Kayden Real Estate, less than 35% of their properties are rented to families There is insufficient evidence to conclude that the proportion of Australians who are married has changed since the 1980. Independent samples t-test A researcher hypothesised that the blood cholesterol levels of people who do not exercise regularly would be higher than those of regular exercisers. In a random sample of 78 adults, the average blood cholesterol level of the non-exercisers( X= 247.65mg/dl, s = 33.44mg/dL, n = 43) was higher than the average blood cholesterol level of the people who exercise regularly ( X= 189.06mg/dL, s = 35.96mg/dl, n = 35), and an independent samples t-test shows that this difference in mean blood cholesterol level is significant, t(76) = 7.44, p < . 001. The 95% confidence interval indicates that the mean blood cholesterol level for people who do not exercise regularly is between 42.9 and 74.3 mg/dl higher than for people who do. As expected, the blood cholesterol levels of non-exercisers are higher than for those people who exercise regularly. Contrary to expectations, the time taken to run 25 metres by children from Easterly Primary School was longer than for children from Northhaven Primary School. There is insufficient evidence to suggest that fuel consumption is different for drivers in the Northern anD .. Centre - What's typical? and Spread. If the distribution is