Question 4 1 Point A researcher measured the weight of 36 koalas. The sample had a mean of 2.4xg and a sample standard deviation of 0.5 kg. Which formula should they use to determine the 99%% confidence Interval for the mean. We want to use t-tables only. 99% CL of the mean = 24 _ (2.72)(0.25] 99% CL of the mean = 24 + (2.58)(0 5) 99% CL of the mean = 2.4 + (2.58)(0.08] 99% CL of the mean = 2.4 _ (2.72 0.5] 99% CL of the mean = 24 _ (2.72)(0.08] Question 5 1 Point A group of enterprising university students decide to examine the distribution of beer prices between various pubs and clubs. They visit 20 establishments in Townsville and find that the average price of a schooner of the cheapest beer on tap is $6.37, with a standard deviation of $0.27. Based on this sample, what range of values would have a 958 chance of encompassing the truc population mean price? Assume that beer prices are normally distributed and the pubs and clubs represent a simple random sample. [5.80,6.94) (5.91,6.37) [6.27,6.47) [6.24,6.50) Question 6 1 Point Which of the following is a property of the sampling distribution of Yz If you increase the sample size, y will always get closer to u, the population mean. The mean of the sampling distribution is , the population mean. The standard deviation of the sample mean is the same as the standard deviation of the population mean. The sample means are always normally distributed. Question 7 1 Point Compute the probability of obtaining a t value greater than 1.372184 If : follows a t-distribution with 10 degrees of freedom. 0.05 0.95 0.9 0.1