The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p. m.). They selected 13 patrons and had them get in line between 2 and 3 p. m. Each was given a stopwatch to
record the time they spent in line. The times recorded were as follows (in minutes).

118,124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118
What are the lower and upper limits?

a. 80.5, 154.00
b. 15.75, 31.50
c. 108.5, 128.5
d. 127.75, 138.25
e. 143.50, 154.00

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?