Question 7 (1 point)
NASA compares the ages of stars in two distinct clusters. A sample from the first cluster has an average age of 4.267 billion years with a standard deviation of 2.388 billion years. A sample from the second cluster has an average age of 3 billion years with a standard deviation of 0.862 billion years. NASA samples 106 stars from the first cluster and 190 stars from the second cluster. Given that the 95% CI from a point estimate of the sample mean of cluster 1 minus the sample mean of cluster two is (0.796, 1.738), we may conclude that the population mean of cluster 1 is not significantly different from the population mean of cluster 2.