quiz 19 9.1-9.11

Question 1

Find the mean, median, and mode:

12; 10; 9; 4; 10; 8; 3; 5; and 11

Answer 1

Mean (the average) 12 + 10 + 9 + 4 + 10 + 8 + 3 + 5 + 11 = 72 72 divided by 9 = 8
median (the middle #) 3,4,5,8,9,10,10,11,12 middle number is 9 so median is 9
mode (# that occurs most frequently) 10

Question 2

Find the mean, median, and mode:

54; 18; 76; 42; 76; and 46

Answer 2

mean (average) 52
median (if there are an even amount of #s, average 2 middle #s) 18,42,46,54,76,76 so average 46 & 54 & get 50 as the median
mode (# that occurs most) 76

Question 3

Find the Pct for 12 games won out of 21 games played. Round to the nearest thousandth.

Answer 3

12 divided by 21 = .571

Question 4

Find the Pct for 10 games won and 8 games lost. Round to the nearest thousandth.

Answer 4

10 divided by 18 (the total number of games) = .556

Question 5

If 1/4 inch equals 50 miles, find the miles represented by 4 1/2 inches.

Answer 5

4 1/2 divided by 1/4 = 9/2 x 4/1 = 18

18 x 50 = 900 miles

Question 6

If 1 centimeter represents 40 kilometers, how many centimeters are needed to represent 440 kilometers?

Answer 6

1/40 = ___/440
440 divided by 40 = 11 1 x 11 = 11
answer is 11