Martin earned the following scores on his last five tests. 98, 78, 84, 75, 91
What is the mean of his scores?

85.2
106.5
71
84

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?