1. In a brand recognition study, 1172 consumers knew of Coke, and 15 did not. Use these results to estimate the probability that a randomly selected consumer will recognize Coke. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol. prob =____? %

2. The time needed to complete a math examination is bell-shaped with a mean of 60 minutes and a standard deviation of 15 minutes.

a) What percentage of students will complete the exam in 30 minutes or less?

%

b) Assume that the class has 180 students and that the examination period is 90 minutes in length. How many students do you expect will not be able to complete the exam in the allotted time? Round answer to the nearest whole number.

c) A student is classified as extremely "efficient" if the amount of time spent on the exam is the lowest 0.15% for the distribution. What is the upper limit for the time it takes an extremely "efficient" student to finish the exam?

minutes?

4. Based on the data shown below, calculate the slope and y-intercept and determine the regression line.

x	y
2	4.8
3	4.1
4	5
5	3.7
6	3.7
7	6
8	5.4
9	4.5
10	3.5
11	3.4
12	1.3
13	2.2

Round each value to two decimal places. y______? = +_______? x