1) find the mean for the given sample data. unless indicated otherwise, round your answer to one more decimal place than is present in the original data values.

the amount of time (in hours) that sam studied for an exam on each of the last five days is given below.

1.7 7.7 8.3 1.6 5.1

find the mean study time

a) 4.96 hr
b) 5.45 hr
c) 4.88 hr
d) 24.40 hr

2) in order to avoid staying after work, a quality control analyst inspects the first 100 items produced that day. which sampling method did she use?

a) cluster
b) systematic
c) stratified
d) convenience

3) what is the probability that two events, a and b, will occur at the same time?

a) p(a)+p(b)
b) p(a and b)
c) p(a or b)

4) a yogurt shop offers 6 different flavors of frozen yogurt and 12 different toppings. how many choices are possible for a single serving of frozen yogurt with one topping?

a) 72
b) 665,280
c) 144
d) 36

5) find the mean and range. 26 19 23 39 31 34 23 25

a) mean = 28.7; range = 20
b) mean = 27.5; range = 20
c) mean = 26; range = 21
d) mean = 27.5; range = 21

6) a ball is thrown into the air with an upward velocity of 36 ft/s. its height h in feet after t seconds is given by the function mc011-1.jpg. in how many seconds does the ball reach its maximum height? round to the nearest hundredth if necessary. what is the ball’s maximum height?

a) 1.13 s; 29.25 ft
b) 1.13 s; 31.5 ft
c) 1.13 s; 69.75 ft
d) 2.25 s; 9 ft

7) use any method to solve the equation. if necessary, round to the nearest hundredth.

4x^2 - 28 x= -11

a) 6.58, 0.42
b) 79.5, –72.5
c) –0.42, –6.58
d) 13.16, 1.67

8) the cost of textbooks for a school increases with the average class size. identify the independent and dependent quantity in the situation.

a) cost; number of classes
b) number of classes; average class size
c) cost; average class size
d) average class size; cost

9) find the distance between points p(8, 2) and q(3, 8) to the nearest tenth.

a) 14.9
b) 61
c) 11
d) 7.8