An urban planner collects data on how park trails are used by residents. The planner looks at two trails: winds through an urban area and another in a suburban park. The table shows the number of users who
or bike the trail.
Activity
Walk
Jog
Bike
T
Urban
76
58
23
Type of Park
Suburban
125
76
42
Total
201
134
65
4
What proportion of park users jog on the park trail?
O 0.1625
O 0.3350
O 0.4328
O 0.5672

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?