Questions 1-5 refer to the small group of data shown below. XY4322074562 ΣX + ΣY is equal to: (ΣY)² is equal to: ΣY² is equal to: (ΣX)(ΣY) is equal to: Σ(3X+4) is equal to: Short Answer Questions 6-9 will use the data below representing a frequency distribution for majors in the School of Liberal Arts and Education. XFSociology50Psychology40Criminal Justice60Political Science25Music20Journalism15Drama0 What kind of graph would you use to represent this frequency distribution? What proportion of students majored in psychology? (Make sure you show your work) What percentage of students majored in Political Science? A veterinarian is interested in the life span of golden retrievers. She recorded the age at death (in years) of the retrievers treated in her clinic. The ages were 12, 9, 11, 10, 8, 16, 12, 1, 9, 12. Calculate the mean median and mode. For the above example, after examining her records, the veterinarian determined that the dog that had died at 1 year was killed by a car. Recalculate the mean median, and mode without that dog’s data. There are three fourth-grade classes at Happy Valley elementary School. The mean IQ for 10 students in the gifted class is 119. For the 20 students in the regular class, the mean IQ is 106. Finally, the five pupils in the special class have a mean IQ of 88. Calculate the mean IQ for all 35 fourth graders. A psychology teacher has given an exam where the highest possible score is 200 points. The mean score for the 30 students in the class is 156 and the standard deviation was 24. Because there was one question that every student answered incorrectly, the teacher decides to add 10 points to every students’ score. After this transformation, what will the mean be?

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Answered: Questions 1-5 refer to the small group…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Questions 1-5 refer to the small group of data shown below.

X	Y
4	3
2	2
0	7
4	5
6	2

ΣX + ΣY is equal to:

(ΣY)² is equal to:

ΣY² is equal to:

(ΣX)(ΣY) is equal to:

Σ(3X+4) is equal to:

Short Answer Questions 6-9 will use the data below representing a frequency distribution for majors in the School of Liberal Arts and Education.

X	F
Sociology	50
Psychology	40
Criminal Justice	60
Political Science	25
Music	20
Journalism	15
Drama	0

What kind of graph would you use to represent this frequency distribution?

What proportion of students majored in psychology? (Make sure you show your work)

What percentage of students majored in Political Science?

A veterinarian is interested in the life span of golden retrievers. She recorded the age at death (in years) of the retrievers treated in her clinic. The ages were 12, 9, 11, 10, 8, 16, 12, 1, 9, 12. Calculate the mean median and mode.

For the above example, after examining her records, the veterinarian determined that the dog that had died at 1 year was killed by a car. Recalculate the mean median, and mode without that dog’s data.

There are three fourth-grade classes at Happy Valley elementary School. The mean IQ for 10 students in the gifted class is 119. For the 20 students in the regular class, the mean IQ is 106. Finally, the five pupils in the special class have a mean IQ of 88. Calculate the mean IQ for all 35 fourth graders.

A psychology teacher has given an exam where the highest possible score is 200 points. The mean score for the 30 students in the class is 156 and the standard deviation was 24. Because there was one question that every student answered incorrectly, the teacher decides to add 10 points to every students’ score. After this transformation, what will the mean be?

Definition Definition Measure of central tendency that is the value that occurs most frequently in a data set. A data set may have more than one mode if multiple categories repeat an equal number of times. For example, in a data set with five item—3, 5, 5, 29, 473—the mode is 5 because it occurs twice and no other value occurs more than once. On a histogram or bar chart, the element with the highest bar represents the mode. Therefore, the mode is sometimes considered the most popular option. The mode is useful for nominal or categorical data (e.g., the most common color car that users purchase), but it is problematic for continuous data because it is more likely not to have any value that is more frequent than the other.

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