Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

7th Grade Math > Chapter 7 - Statistics > Flashcards

Chapter 7 - Statistics Flashcards

1
Q

Box and Whisker Plot

A

A diagram that summarizes data using the median, the upper and lowers quartiles, and the extreme values (minimum and maximum). Box and whisker plots are also known as box plots. It is constructed from the five-number summary of the data: Minimum, Q1 (lower quartile), Q2 (median), Q3 (upper quartile), Maximum.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Dot Plot

A

A method of visually displaying a distribution of data values where each value is shown as a dot above a number line. (A dot plot is a type of line plot that uses dots instead of “x’s” to show the frequency of values.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Frequency

A

The number of times an item, number, or event occurs in a set of data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Histogram

A

A way of displaying numeric data using horizontal or vertical bars so that the height or length of the bars indicates frequency.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Inter-Quartile Range (IQR)

A

The difference between the first and third quartiles. (Note that the first quartile and third quartiles are sometimes called upper and lower quartiles.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Maximum Value

A

The largest value in a set of data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Mean Absolute Deviation

A

The average distance of each data value from the mean. The MAD is a gauge of “on average” how different the data values are from the mean value.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Mean

A

The “average” or “fair share” value for the data. The mean is also the balance point of the corresponding data distribution.

Arithmetic Mean= x= x1+x2+x3+x4…….xn
_______________
n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Measures of Center

A

The mean and the median are both ways to measure the center for a set of data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Measures of Variation (Spread)

A

The range and the Mean Absolute Deviation are both common ways to measure the spread for a set of data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Median

A

The value for which half the numbers are larger and half are smaller. If there are two middle numbers, the median is the arithmetic mean of the two middle numbers. Note: The median is a good choice to represent the center of a distribution when the distribution is skewed or outliers are present.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Minimum value

A

The smallest value in a set of data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Mode

A

The number that occurs the most often in a list. There can be more than one mode, or no mode.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Outlier

A

A value that is very far away from most of the values in a data set.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Population

A

A group about which information is desired.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Quartile

A

When data in a set are arranged in order, quartiles are the numbers that split the data into quarters (or fourths).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Range

A

A measure of spread for a set of data. To find the range, subtract the smallest value from the largest value in a set of data.

18
Q

Statistical or Non-Statistical:

How old are the students in my school?

A

Statistical

19
Q

Statistical or Non-Statistical:

How old am I?

A

Non-Statistical

20
Q

Statistical or Non-Statistical:

How many pets do I own?

A

Non-Statistical

21
Q

Statistical or Non-Statistical:

How many pets are owned by each student in my grade level?

A

Statistical

22
Q

Statistical or Non-Statistical:

What is my math test score?

A

Non - Statistical

23
Q

Statistical or Non-Statistical:

How many cupcakes of each type were made at the bakery in a week?

A

Statistical

24
Q

Statistical or Non-Statistical:

What is my height?

A

Non-Statistical

25
Q

Statistical or Non-Statistical:

What is my favorite type of cupcake?

A

Non-Statistical

26
Q

Statistical or Non-Statistical:

What is the height of each person in my class?

A

Statistical

27
Q

Statistical or Non-Statistical:

How many letters are in my name?

A

Non-Statistical

28
Q

Statistical or Non-Statistical:

How many letters are in the names of each person in my class?

A

Statistical

29
Q

Statistical or Non-Statistical:

What are the math test scores of the students in my class?

A

Statistical

30
Q

Statistical or Non-Statistical:

Which gum holds it flavor longer?

A

Statistical

31
Q

Write a statistical question that would help you gather data about the number of miles students at your school walk each week.

A

How many miles do the students on the Cool Cats’ team walk each week?

32
Q

Coach Peavy is interested in learning about the amount of time players on the team spend practicing each week during the off season. What is a statistical question he can ask the players that will help him collect this data?

A

How many days a week do the baseball team members at BMS spend practicing during the off season?

33
Q

School sit-up Records: 31 28 30 31 30

Mean_____
Median_____
Mode_____
Range_____

A

Mean: 30
Median: 30
Mode: 30 & 31
Range: 3

34
Q

Daily Winter Temperature: 45 50 47 52 53 45 51

Mean_____
Median_____
Mode_____
Range_____

A

Mean: 49
Median: 50
Mode: 45
Range: 8

35
Q

State Number of Counties

Illinois 102

Iowa 99

North Carolina 100

Tennessee 95

Virginia 95

Mean_____
Median_____
Mode_____
Range_____

A

Mean: 98.2
Median: 99
Mode: 95
Range: 7

36
Q

Lars has a score of 89 for each of his first 3 science quizzes. The score on his fourth quiz is 92. What score does he need on his fifth quiz to have an average of 90?

A

91

37
Q

The prom committee kept count of how many tickets it sold each day during lunch:
12, 32, 36, 41, 22, 47, 51, 33, 37, 49

A

9

38
Q

For the next two data sets, find the Mean Absolute Deviation

a. Data Set 4: 5, 10, 34, 22, 9, 23, 20, 4, 16, 10
b. Data Set 5: 3, 10, 20, 22, 45, 1, 35, 33, 23, 10

A

a. 7.7

b. 11.4

39
Q 
The students in Mr. Harp’s science class took a benchmark last week. The following were the grades 
on the test:

89, 94, 90, 92, 88, 99, 23, 97, 94, 17

Find the mean, median, mode, range, and mean absolute deviation for the set of data.

A 
Mean:     78.3   
Median:  91  
Mode:     94   
Range:    82  
MAD:      23.32
40
Q

Which measure of central tendency best represents the classes grades and why?

A

Median b/c high MAD which means there is an outlier(s) in the data. The mean is not reliable.

7th Grade Math (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions