L03 Quiz_ Homework_ Social Science Statistics
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School
Brigham Young University, Idaho *
*We aren’t endorsed by this school
Course
221 C
Subject
Mathematics
Date
Apr 3, 2024
Type
Pages
7
Uploaded by DeaconWolverine3338
L03 Quiz: Homework
Due Jan 20 at 10:59pm
Points 13
Questions 13
Time Limit None
Allowed Attempts 2
Instructions
Attempt History
Attempt
Time
Score
KEPT
Attempt 2
9 minutes
13 out of 13
LATEST
Attempt 2
9 minutes
13 out of 13
Attempt 1
34 minutes
12 out of 13
Score for this attempt: 13 out of 13
Submitted Jan 18 at 8:02pm
This attempt took 9 minutes.
Preparation
Download the L03 Homework Assignment
(https://byuistats.github.io/BYUI_M221_Book/hp/L03/03_HW_Assignment_A.html) and answer the
questions.
Attempt each problem on your own.
You are encouraged to collaborate with other students after your first attempt.
Download the L03 Homework Answer Key
(https://byuistats.github.io/BYUI_M221_Book/hp/L03/03_HW_Answer_Key_A.html) and check your
answers.
Take the Quiz
You may use your notes, but you should complete the quiz without help from others.
This quiz is a tool to help you and your instructor gauge your progress.
On this quiz, you may use your notes, but you should complete the quiz without help from others. This
quiz is a tool to help you and your instructor gauge your progress.
Use the following information to answer the next 2 parts.
Question 1
1 / 1 pts
Correct!
The mean will increase.
The mean will decrease.
The mean will stay the same.
It is not possible to determine this without the full data set.
Question 2
1 / 1 pts
The median will increase.
The median will decrease.
The median will stay the same.
Correct!
It is not possible to determine this without the full data set.
Question 3
1 / 1 pts
For a Math 221 project, one group of students studied the ages of students on the BYU-Idaho campus.
They collected data from a random sample of n = 100 students. The sample mean was 21.2. An excerpt
of their data is given below.
The group notices an error in their data. The age of one of the males (ID=3) was entered incorrectly. He
is actually 21 years old.
Part 1: When the error is corrected, what will happen to the sample mean?
Part 2: When the error is corrected, what will happen to the sample median?
Which one of the following histograms was made from data that are definitely skewed right?
Correct!
The graph below illustrates typical student hourly wages for BYU-Idaho.
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Question 4
1 / 1 pts
The mean is $9.38/hour. The median is $11.25/hour.
Correct!
The mean is $11.25/hour. The median is $9.38/hour.
This cannot be determined from the information given
Question 5
1 / 1 pts
Correct!
74.75
74.75 (with margin: 0.001)
The teacher recorded the mean and median of the hourly wage for each student. Unfortunately, he
forgot to label them. The numbers he wrote down were: $11.25/hour and $9.38/hour. Which would be the
mean and which would be the median?
The following file contains the grades of 20 students who took a specific exam: Grades.xlsx
(https://byui.instructure.com/courses/275982/files/120306164/download?wrap=1) (https://byui.instructure.com/courses/275982/files/120306164/download?download_frd=1)
Use this file to answer all parts.
Part 1: What is the mean grade of the grades?
Question 6
1 / 1 pts
Correct!
75
75 (with margin: 0)
Question 7
1 / 1 pts
Correct!
50
50 (with margin: 0)
Question 8
1 / 1 pts
5*sqr(7)
=5xsqrt(7)
Correct!
=5*sqrt(7)
=5sqrt(7)
Part 2: What is median grade?
Part 3: What percent of the students scored below 75? (enter your answer as a percent without the
percent sign)
If you wanted excel to evaluate the following mathematical expression , what would you type into
excel?
Use the below histogram to answer all the parts that follow.
Question 9
1 / 1 pts
Right Skewed
Correct!
Left Skewed
Symmetric
Bimodal
Question 10
1 / 1 pts
Correct!
7
7 (with margin: 0)
Question 11
1 / 1 pts
Symmetric
Left Skewed
Correct!
Part 1: What is the shape of the histogram?
Part 2: How many years did the stocks have a return between 0% and 10%?
In the data you used in your Prep Quiz, graph a histogram of the 'Wrong Patient'. What is the shape of
the histogram? The file can be found here: WrongSiteWrongPatient.xlsx
(https://byuistats.github.io/BYUI_M221_Book/Data/WrongSiteWrongPatient.xlsx)
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Right Skewed
Question 12
1 / 1 pts
Symmetric
Correct!
Left Skewed
Right Skewed
Question 13
1 / 1 pts
Correct!
2
2 (with margin: 0)
Quiz Score: 13 out of 13
COPYRIGHT 2024 BRIGHAM YOUNG UNIVERSITY-IDAHO
Rebecca collected data and told you that her sample mean was 56 and her sample median was 64. She
then draws a histogram based on her data and asks you to guess the shape of it without looking. What
would the most likely shape be for her histogram?
What is the mode of the following set of numbers:
1, 3, 2, 8, 9, 10, 8, 3, 2, 4, 2, 10, 6.