Test 7, Unit 6 Flashcards
collection of facts; information
data
difference between highest and lowest statistics
range
drawing that uses a scale to represent distance or size
scale drawing
each part of a circle graph
sector
number expressed as a fraction which expresses the likelihood of the occurence of an event
probability
numerical data that are collected, classified, and tabulated
statistics
picture that illustrates data
graph
write the range of 52; 83; 69; 39
83 - 39 =
44
Find the distance between two cities that are 2 inches apart on a map that uses the scale 1/4 in. = 50 mi.
1/4 2
____ = ____
50 x
1/4x = 100
x = 100 x 4
x = 400
Write the probability that the letters BR would be the first two letters in a code that is chosen at random.
1/26 for B & 1/26 for R, so multiply them for the total probability
1/26 x 1/26 = 1/676
Find the mode of 14, 12, 9, 12, 7, 9, 11, 12, 6, 7
12
The name of the graph that uses pictures to illustrate data.
Pictograph
name of the graph that deals with frequency
histogram
The the mean of 23, 28, 24, 25
add them & get 100
100 divided by 4 is 25
Find the median of 93, 87, 90, 74, 77, 95, 88, 81, 99
88
the number of degrees in a circle
360*
the name of the graph that shows the relationship between the parts of a whole
circle graph
Find the mean, median, mode & range of
6,3,5,2,7,8,4
mean 5
median 5
no mode
range 6
If there are 3 green marbles and 4 blue marbles in a box, what is the probability that you would pick a blue marble?
4/7
If a student thinks of a number from 1 to 75, what is the probability that the number will be 20, 30, or 40?
3/75
reduce to 1/25
Sam made 84% on a science test. The test had 25 questions of equal point value. How many questions did sam miss?
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.
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?
1/2 / 60 = 2/x
1/2 x = 120
x = 120 x 2
x = 240
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.
1/2 / 20 = x / 55
20x = 27.5
x = 1.375 = 1 3/8 in.
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.
1/4 / 10 = 7 / x
1/4x = 70
x = 70 x 4
x = 280 ft.
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?
1/2in. / 1 yd = 4.5/x
1/2x = 4.5
x = 4.5 x 2
x = 9 yd.
