Test 7, Unit 6

Question 1

collection of facts; information

Answer 1

data

Question 2

difference between highest and lowest statistics

Answer 2

range

Question 3

drawing that uses a scale to represent distance or size

Answer 3

scale drawing

Question 4

each part of a circle graph

Answer 4

sector

Question 5

number expressed as a fraction which expresses the likelihood of the occurence of an event

Answer 5

probability

Question 6

numerical data that are collected, classified, and tabulated

Answer 6

statistics

Question 7

picture that illustrates data

Answer 7

graph

Question 8

write the range of 52; 83; 69; 39

Answer 8

83 - 39 =

44

Question 9

Find the distance between two cities that are 2 inches apart on a map that uses the scale 1/4 in. = 50 mi.

Answer 9

1/4 2

____ = ____

50 x

1/4x = 100

x = 100 x 4

x = 400

Question 10

Write the probability that the letters BR would be the first two letters in a code that is chosen at random.

Answer 10

1/26 for B & 1/26 for R, so multiply them for the total probability

1/26 x 1/26 = 1/676

Question 11

Find the mode of 14, 12, 9, 12, 7, 9, 11, 12, 6, 7

Answer 11

12

Question 12

The name of the graph that uses pictures to illustrate data.

Answer 12

Pictograph

Question 13

name of the graph that deals with frequency

Answer 13

histogram

Question 14

The the mean of 23, 28, 24, 25

Answer 14

add them & get 100

100 divided by 4 is 25

Question 15

Find the median of 93, 87, 90, 74, 77, 95, 88, 81, 99

Answer 15

88

Question 16

the number of degrees in a circle

Answer 16

360*

Question 17

the name of the graph that shows the relationship between the parts of a whole

Answer 17

circle graph

Question 18

Find the mean, median, mode & range of

6,3,5,2,7,8,4

Answer 18

mean 5

median 5

no mode

range 6

Question 19

If there are 3 green marbles and 4 blue marbles in a box, what is the probability that you would pick a blue marble?

Answer 19

4/7

Question 20

If a student thinks of a number from 1 to 75, what is the probability that the number will be 20, 30, or 40?

Answer 20

3/75

reduce to 1/25

Question 21

Sam made 84% on a science test. The test had 25 questions of equal point value. How many questions did sam miss?

Answer 21

100 total points divided by 25 questions make the questions worth 4 points each.

Sam made 84, so he got 16 points counted off.

16 divided by 4 = 4 questions missed.

Question 22

A map has a scale 1/2 in. = 60 mi. If two cities are 2 inches apart on the map, how many miles separate the cities?

Answer 22

1/2 / 60 = 2/x

1/2 x = 120

x = 120 x 2

x = 240

Question 23

Find the distance between two cities on a map if the scale used is 1/2 in = 20 mi. and the cities are 55 miles apart.

Answer 23

1/2 / 20 = x / 55

20x = 27.5

x = 1.375 = 1 3/8 in.

Question 24

Find the length of the actual object if the scale for the drawing is 1/4 in. = 10 ft. and the scaled side is 7 in.

Answer 24

1/4 / 10 = 7 / x

1/4x = 70

x = 70 x 4

x = 280 ft.

Question 25

An architect uses the scale 1/2 in. = 1 yd. to make his blueprint for a building. If he draws a line segment 4 1/2 inches long, what actual size does it represent?

Answer 25

1/2in. / 1 yd = 4.5/x

1/2x = 4.5

x = 4.5 x 2

x = 9 yd.