Show all of your work to obtain partial or full credit. remember significant figures in your calculations! 1. (8 pts) for the numbers 116.0, 97.9,114.2, 106.8, 108.3, calculate the following: a. mean b. standard deviation c. range d, 90% confidence interval for the mean. (4 pts) using the grubbs test, decide whether the number 97.9 should be discarded from your analysis of the data in question 1. explain your answer 2.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.