We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

ISEE Upper Level Math : Mean

Study concepts, example questions & explanations for ISEE Upper Level Math

Create An Account

All ISEE Upper Level Math Resources

6 Diagnostic Tests 244 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

← Previous 1 2 3 4 Next →

Example Question #611 : Isee Upper Level (Grades 9 12) Mathematics Achievement

The heights of a football team's members are 68,70,75,72,73 and inches. Find the mean of the heights.

Possible Answers:

74in

73in

74,667in

73.667in

72.667in

Correct answer:

72.667in

Explanation:

The mean is the sum of all the data values divided by the number of values. So we can write:

$Mean=\frac{68+70+75+72+73+78}{6}\approx 72.667 in$

Report an Error

Example Question #61 : Data Analysis And Probability

Consider the following set of scores from a physics test. Give the mean of the scores.

$\left \{ 75,73,84,81,68,95,77 \right \}$

Possible Answers:

79.5

Correct answer:

Explanation:

The mean of the scores can be calculated as:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum_{}^{}$ indicates the sum of the data values $x_{i}$ , and is the number of data values. So we can write:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}=\frac{75+73+84+81+68+95+77}{7}=\frac{553}{7}=79$

Report an Error

Example Question #613 : Isee Upper Level (Grades 9 12) Mathematics Achievement

The mean of five numbers is . Give their sum.

Possible Answers:

240

150

160

200

180

Correct answer:

160

Explanation:

The mean of five numbers is equal to their sum divided by , or as a formula we can write:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum_{}^{}$ indicates the sum of the data values $x_{i}$ , and is the number of data values. So we can write:

$\sum_{i=1}^n{x_{i}=n\bar{x}\Rightarrow \sum_{i=1}^n{x_{i}=5\times 32=160$

Report an Error

Example Question #11 : How To Find Mean

The sum of numbers is 8t+16 . Find the mean in terms of . ( is a real number)

Possible Answers:

8t+4

t-2

t+4

8t+2

t+2

Correct answer:

t+2

Explanation:

The mean of eight numbers is equal to their sum divided by or as a formula we can write:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}\Rightarrow \frac{8t+16}{8}=\frac{8(t+2)}{8}=t+2$

Report an Error

Example Question #11 : How To Find Mean

In the following set, find the mean in terms of .

$\left \{ t^2-1,t,t^2,2t,1-t^2,-t^2,7t,8-2t \right \}$

Possible Answers:

4t+4

2t+2

8t+8

t+1

t+2

Correct answer:

t+1

Explanation:

The mean of the scores can be calculated as:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum_{}^{}$ indicates the sum of the data values $x_{i}$ , and is the number of data values. So we can write:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}=\frac{t^2-1+t+t^2+2t+1-t^2-t^2+7t+8-2t}{8}$

$=\frac{(t^2+t^2-t^2-t^2)+(t^2+2t+7t-2t)+(-1+1+8)}{8}$

$=\frac{0+8t+8}{8}=\frac{8(t+1)}{8}$

Report an Error

Example Question #621 : Isee Upper Level (Grades 9 12) Mathematics Achievement

The sum of a set of values is . If the mean of the data set is , give the number of values in the set.

Possible Answers:

Correct answer:

Explanation:

Mean of the scores can be calculated as:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum_{}^{}$ indicates the sum of the data values $x_{i}$ , and is the number of data values. So we can write:

$\bar{x}=\frac{1}{n}\sum_{i=1}^n{x_{i}\Rightarrow n=\frac{1}{\bar{x}}\sum_{i=1}^n{x_{i}=\frac{72}{12}=6$

Report an Error

Example Question #61 : Data Analysis And Probability

The mean of test scores is . When the 15th student takes the test, the mean goes down by two points. Give the 15th score.

Possible Answers:

Correct answer:

Explanation:

The total of test scores is $14\times 75=1050$ . The mean of the total scores for students would be:

$\bar{x}=\frac{1}{n}\sum_{i=1}^{n}x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum$ indicates the sum of the data values $x_{i}$ and is the number of data values. So we can write:

$\bar{x}=\frac{1}{n}\sum_{i=1}^{n}x_{i}=\frac{1050+x_{15}}{15}=75-2$

$\Rightarrow 1050+x_{15}=73\times 15$

$\Rightarrow x_{15}=1095-1050$

$\Rightarrow x_{15}=45$

Report an Error

Example Question #11 : How To Find Mean

The sum of test scores is 770 . When the 11th student takes the test, the mean of the scores does not change. Give the score of the 11th student.

Possible Answers:

Correct answer:

Explanation:

The mean is the sum of the data values divided by the number of values or as a formula we have:

$\bar{x}=\frac{1}{n}\sum_{i=1}^{n}x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum$ indicates the sum of the data values $x_{i}$ and is the number of data values. So we have:

$\bar{x}=\frac{1}{n}\sum_{i=1}^{n}x_{i}=\frac{770}{10}=77$

When the 11th student takes the test the mean of the score does not change. Let:

x=11th student score. So we can write:

$New\ Mean=77=\frac{770+x}{11}\Rightarrow 770+x=77\times 11$

$\Rightarrow x=847-770=77$

That means the 11th student should get the score of which is equal to the initial mean in order to get the same value for the new mean.

Report an Error

Example Question #11 : How To Find Mean

The sum of test scores is 1558 . When the 20th student takes the test and gets a score of , how does the mean change?

Possible Answers:

The mean goes up by points.

The mean goes down by 0.6 points.

The mean goes down by points.

The mean goes up by 0.6 points.

Correct answer:

The mean goes down by 0.6 points.

Explanation:

The mean is the sum of the data values divided by the number of values or as a formula we have:

$\bar{x}=\frac{1}{n}\sum_{i=1}^{n}x_{i}$

Where:

$\bar{x}$ is the mean of a data set, $\sum$ indicates the sum of the data values $x_{i}$ and is the number of data values. The total of test scores is 1558 ; the mean of the scores is:

$\bar{x}=\frac{1}{n}\sum_{i=1}^{n}x_{i}=\frac{1558}{19}=82$

When the 20th student takes the test the sum of scores would be 1558+70=1628 and the new mean of the scores is:

$\bar{x_{1}}=\frac{1}{n}\sum_{i=1}^{n}x_{i}=\frac{1628}{20}=81.4$

Report an Error

Example Question #14 : How To Find Mean

A gymnastics meet has seven judges. After each routine, each judge assigns a merit-based score from 0 to 10; a contestant's score for the routine is the mean of all the judges' scores except for the highest and the lowest.

The seven judges individually assigned the following scores to one of Donna's routines: 9.2, 9.5, 9.6, 9.7, 9.5, 9.0, 8.7 . What is Donna's score, rounded to the nearest tenth?

Possible Answers:

9.2

9.3

9.5

9.1

9.4

Correct answer:

9.4

Explanation:

The highest and lowest scores, 9.7 and 8.7 , are tossed out, so Donna's score is the mean of the five that remain.

$\frac{ 9.2+ 9.5+9.6+ 9.5+ 9.0 }{5} = \frac{ 46.8 }{5} = 9.36 \approx 9.4$

Report an Error

← Previous 1 2 3 4 Next →

View Tutors

Jaroslaw
Certified Tutor

Heriot Watt University, Master of Science, Physics. Heriot Watt University, Doctor of Science, Theoretical and Mathematical P...

View Tutors

Gregory
Certified Tutor

Pennsylvania State University-Main Campus, Bachelor of Science, Chemical Engineering. Carnegie Mellon University, Doctor of P...

View Tutors

Anubhuti
Certified Tutor

KiiT University, Bachelor of Science, Electronics Technology.

All ISEE Upper Level Math Resources

6 Diagnostic Tests 244 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

Spanish Tutors in Dallas Fort Worth, French Tutors in Chicago, Statistics Tutors in Los Angeles, Physics Tutors in Miami, French Tutors in Seattle, English Tutors in Los Angeles, Physics Tutors in San Diego, GRE Tutors in Washington DC, English Tutors in San Diego, Algebra Tutors in Seattle

Popular Courses & Classes

SSAT Courses & Classes in Seattle, MCAT Courses & Classes in Dallas Fort Worth, SSAT Courses & Classes in Atlanta, GRE Courses & Classes in Washington DC, GRE Courses & Classes in Dallas Fort Worth, SAT Courses & Classes in Washington DC, Spanish Courses & Classes in Dallas Fort Worth, Spanish Courses & Classes in New York City, Spanish Courses & Classes in Miami, GMAT Courses & Classes in San Diego

Popular Test Prep

SSAT Test Prep in San Diego, SAT Test Prep in Dallas Fort Worth, GMAT Test Prep in Los Angeles, SSAT Test Prep in Los Angeles, ISEE Test Prep in Washington DC, GMAT Test Prep in Miami, MCAT Test Prep in Boston, ACT Test Prep in Phoenix, SSAT Test Prep in Atlanta, GRE Test Prep in Dallas Fort Worth

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

ISEE Upper Level Math : Mean

Study concepts, example questions & explanations for ISEE Upper Level Math

All ISEE Upper Level Math Resources

Example Questions

Example Question #611 : Isee Upper Level (Grades 9 12) Mathematics Achievement

Example Question #61 : Data Analysis And Probability

Example Question #613 : Isee Upper Level (Grades 9 12) Mathematics Achievement

Example Question #11 : How To Find Mean

Example Question #11 : How To Find Mean

Example Question #621 : Isee Upper Level (Grades 9 12) Mathematics Achievement

Example Question #61 : Data Analysis And Probability

Example Question #11 : How To Find Mean

Example Question #11 : How To Find Mean

Example Question #14 : How To Find Mean

All ISEE Upper Level Math Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: